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Davila E, Fernandez-Santos NA, Estrada-Franco JG, Wei L, Velázquez-Ramírez DD, García-Miranda R, Irecta Nájera C, Cruz-Cadena R, Guichard-Romero C, Rodriguez C, Tarleton R, Rodríguez-Pérez MA, Ochoa-Díaz-López H, Hamer GL, Hamer SA. Domestic Dog Infection with Trypanosoma cruzi from Northern and Southern Regions of Mexico. Vector Borne Zoonotic Dis 2024; 24:510-519. [PMID: 38949980 DOI: 10.1089/vbz.2023.0110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/03/2024] Open
Abstract
Background: Chagas disease or American trypanosomiasis, caused by Trypanosoma cruzi and vectored by triatomines, affects millions of people worldwide. In endemic countries including Mexico, infections in domestic animals, such as dogs, may affect the risk of human disease when they serve as a source of infection to vectors that subsequently infect humans. Materials and Methods: We conducted a cross-sectional study of 296 dogs from two cities near the northern and southern borders of Mexico: Reynosa, Tamaulipas, and Tuxtla Gutierrez, Chiapas. Infection was measured based on testing of blood using T. cruzi quantitative PCR (qPCR) and up to three antibody detection assays. The StatPak immunochromatographic assay was used to screen samples and the indirect fluorescent antibody (IFA) and multiplex microsphere immunoassay (MIA) tests were used as secondary tests on all samples that screened positive and a subset of negatives. Serologic positivity was defined based on reactivity on at least two independent tests. Results: Of the 280 samples tested for parasite DNA, two (0.7%) were positive, one of which (0.4%) was confirmed as T. cruzi discrete typing unit TcIV. Overall, 72 (24.3%) samples were reactive for T. cruzi antibodies via StatPak of which 8 were also positive using MIA and 2 were also positive using IFA (including one of the PCR-positive dogs). Overall, nine dogs (3.4%) met study criteria of positivity based on either/both serology or PCR tests. Positive dogs were found in both regions of Mexico; five (2.7%) from Reynosa and four (3.6%) from Tuxtla Gutierrez. We found no association between infection status and state of origin, sex, age group, breed group, neighborhood, and whether other pets lived in the home. Conclusion: Our results re-emphasize dogs' utility as sentinels for T. cruzi in Mexico and underscore the need for improved veterinary diagnostic tests and parasite surveillance at the household level in endemic countries.
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Affiliation(s)
- Edward Davila
- Department of Veterinary Integrative Biosciences, Texas A&M University, College Station, Texas, USA
| | - Nadia A Fernandez-Santos
- Department of Entomology, Texas A&M University, College Station, Texas, USA
- Instituto Politécnico Nacional, Centro de Biotecnología Genómica, Laboratorio de Biomedicina Molecular, Reynosa, Tamaulipas, Mexico
| | - José Guillermo Estrada-Franco
- Instituto Politécnico Nacional, Centro de Biotecnología Genómica, Laboratorio de Biomedicina Molecular, Reynosa, Tamaulipas, Mexico
| | - Lihua Wei
- Instituto Politécnico Nacional, Centro de Biotecnología Genómica, Laboratorio de Biomedicina Molecular, Reynosa, Tamaulipas, Mexico
| | | | - Rosario García-Miranda
- Departamento de Salud, El Colegio de la Frontera Sur (ECOSUR), San Cristóbal de Las Casas, México
- Escuela de Lenguas, Universidad Autónoma de Chiapas (UNACH), San Cristóbal de Las Casas, México
| | - Cesar Irecta Nájera
- Departamento de Salud, El Colegio de la Frontera Sur (ECOSUR), Villahermosa, México
| | - Raúl Cruz-Cadena
- Escuela de Ciencias Químicas, Universidad Autónoma de Chiapas (UNACH), Ocozocoautla de Espinosa, México
| | | | - Carlos Rodriguez
- Texas A&M Veterinary Medical Diagnostic Laboratory, College Station, Texas, USA
| | - Rick Tarleton
- Center for Tropical and Emerging Global Diseases, University of Georgia, Athens, Georgia, USA
- Department of Cellular Biology, University of Georgia, Athens, Georgia, USA
| | - Mario A Rodríguez-Pérez
- Instituto Politécnico Nacional, Centro de Biotecnología Genómica, Laboratorio de Biomedicina Molecular, Reynosa, Tamaulipas, Mexico
| | - Héctor Ochoa-Díaz-López
- Departamento de Salud, El Colegio de la Frontera Sur (ECOSUR), San Cristóbal de Las Casas, México
| | - Gabriel L Hamer
- Department of Entomology, Texas A&M University, College Station, Texas, USA
| | - Sarah A Hamer
- Department of Veterinary Integrative Biosciences, Texas A&M University, College Station, Texas, USA
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Martinez Ibarra JA, Martinez BO, Rodas Martinez AZ, Flores RA, Garcia CIM, Franco ER, Villalobos G, Martinez Hernandez F. Trypanosoma cruzi in Wild and Synanthropic Mammals in Two Regions of Mexico: A Fieldwork and Genetic Discrete Typing Unit Review. Vector Borne Zoonotic Dis 2024; 24:499-509. [PMID: 38836751 DOI: 10.1089/vbz.2023.0143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2024] Open
Abstract
Background: Marsupials and rodents are the most important wild and synanthropic hosts of Trypanosoma cruzi due to the high frequency of infection, maintenance of diverse genetic populations of the parasite, and their close proximity to interact with both transmission cycles, sylvatic and peridomestic. Our aim was to identify the discrete typing units (DTU) of T. cruzi from different wild and synanthropic hosts in two regions of Mexico and to carry out a review of historical data focusing on current knowledge on the diversity and T. cruzi DTUs of host species. Materials and Methods: One hundred fifteen samples were obtained from two areas in Tabasco and Nayarit state. The presence of T. cruzi was evaluated by PCR. Results: The 12.6% (12/95) of samples from Tabasco and 65% (13/20) from Nayarit were found to be positive for parasite DNA. All the sequences analyzed were grouped in T. cruzi DTU I; low nucleotide diversity was observed in Tabasco (π = 0.00566, and ϴ = 0.00632), while high genetic diversity was observed in Nayarit sequences, up to 8.63 (π) to 11.10 (ϴ) times greater than Tabasco sequences. Genetic flow and migration between Tabasco, and Nayarit were scarce (FST = 0.37329 and Nm = 0.42), and genetic exchange was observed only between nearby areas. The bibliographic review of hosts in Mexico, together with our data, shows a heterogeneous T. cruzi prevalence in Chiroptera and domestic animals. For Atelidae and Canids, prevalence is generally below 25%. However, a high prevalence, greater than 25% and up to 100%, was recorded in Didelphimorphia, and Rodentia. Few studies in regions of Mexico have been described as infected with the parasite; in these, the genetic group with the highest prevalence is the DTU I. Conclusion: Marsupials and rodents are important reservoirs of T. cruzi; DTU I was frequently reported; however, recent genetic and reservoir studies have demonstrated the presence of greater diversity of genetic groups.
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Affiliation(s)
| | - Brizia Oria Martinez
- Departamento de Ecología de Agentes Patógenos, Hospital General "Dr. Manuel Gea González," Mexico City, Mexico
| | | | - Rafael Avila Flores
- División Académica de Ciencias Biológicas, Universidad Juárez Autónoma de Tabasco, Villahermosa, México
| | | | - Emilio Rendon Franco
- Departamento de Producción Agrícola y Animal, Universidad Autónoma Metropolitana, Mexico City, Mexico
| | - Guiehdani Villalobos
- Departamento de Producción Agrícola y Animal, Universidad Autónoma Metropolitana, Mexico City, Mexico
| | - Fernando Martinez Hernandez
- Departamento de Ecología de Agentes Patógenos, Hospital General "Dr. Manuel Gea González," Mexico City, Mexico
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3
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Flores-López CA, Esquivias-Flores EA, Guevara-Carrizales A. Phylogenetic description of Trypanosoma cruzi isolates from Dipetalogaster maxima: Occurrence of TcI, TcIV, and TcIV-USA. INFECTION, GENETICS AND EVOLUTION : JOURNAL OF MOLECULAR EPIDEMIOLOGY AND EVOLUTIONARY GENETICS IN INFECTIOUS DISEASES 2023; 113:105465. [PMID: 37331498 DOI: 10.1016/j.meegid.2023.105465] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Revised: 06/11/2023] [Accepted: 06/13/2023] [Indexed: 06/20/2023]
Abstract
Trypanosoma cruzi is the parasite responsible for Chagas disease. The parasite has been classified into six taxonomic assemblages: TcI-TcVI and TcBat (aka Discrete Typing Units or Near-Clades). No studies have focused on describing the genetic diversity of T. cruzi in the northwestern region of Mexico. Within the Baja California peninsula lives Dipetalogaster maxima, the largest vector species for CD. The study aimed to describe the genetic diversity of T. cruzi within D. maxima. A total of three Discrete Typing Units (DTUs) were found (TcI, TcIV, and TcIV-USA). TcI was the predominant DTU found (∼75% of samples), in concordance with studies from the southern USA, one sample was described as TcIV while the other ∼20% pertained to TcIV-USA, which has recently been proposed to have enough genetic divergence from TcIV, to merit its own DTU. Potential phenotype differences between TcIV and TcIV-USA should be assessed in future studies.
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Affiliation(s)
- Carlos A Flores-López
- Facultad de Ciencias, Universidad Autonoma de Baja California, Carretera Transpeninsular Ensenada-Tijuana No. 3917, Colonia Playitas C.P. 22860, Ensenada, Baja California, Mexico.
| | - Esteban A Esquivias-Flores
- Facultad de Ciencias, Universidad Autonoma de Baja California, Carretera Transpeninsular Ensenada-Tijuana No. 3917, Colonia Playitas C.P. 22860, Ensenada, Baja California, Mexico
| | - Aldo Guevara-Carrizales
- Facultad de Ciencias, Universidad Autonoma de Baja California, Carretera Transpeninsular Ensenada-Tijuana No. 3917, Colonia Playitas C.P. 22860, Ensenada, Baja California, Mexico
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4
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Paulina OM, Aracely LM, Jaime LD, Jesús TM, Alberto DGJ, Angel RL. Identification of a triatomine infected with Trypanosoma cruzi in an urban area of the state of Veracruz, Mexico: A comprehensive study. Zoonoses Public Health 2023. [PMID: 36915955 DOI: 10.1111/zph.13038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 02/17/2023] [Accepted: 02/21/2023] [Indexed: 03/16/2023]
Abstract
Chagas disease, considered a neglected disease, was initially confined to rural localities in endemic areas; however, in recent years through the process of urbanization and migration of infected people, the disease is gaining importance in urban environments. The presence of the vector in urban areas in most cases is due to the passive transport of vectors, but recently, its presence seems to be linked to vector adaptation processes associated with climate change. This paper reports the occurrence of an infected triatomine in the peridomicile of a house in an urban area of Córdoba, Veracruz, Mexico, where the species found is described, the molecular characteristics and resistance to BZN and NFX of the Trypanosoma cruzi isolate obtained, as well as serological data of the dwelling inhabitants. These urban disease scenarios make it possible to generate new scientific knowledge and enable the creation of new control strategies for Chagas disease vectors.
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Affiliation(s)
- Ochoa-Martínez Paulina
- Doctorado en Ciencias Biomédicas, Universidad Veracruzana, Xalapa, Mexico.,LADISER Inmunología y Biología Molecular, Facultad de Ciencias Químicas, Universidad Veracruzana, Orizaba, Mexico
| | - López-Monteon Aracely
- LADISER Inmunología y Biología Molecular, Facultad de Ciencias Químicas, Universidad Veracruzana, Orizaba, Mexico.,Asociacion Chagas con Ciencia y Conocimiento A.C., Orizaba, Mexico
| | - López-Domínguez Jaime
- LADISER Inmunología y Biología Molecular, Facultad de Ciencias Químicas, Universidad Veracruzana, Orizaba, Mexico.,Ingeniería en Biotecnología, Universidad Politécnica de Huatusco, Huatusco de Chicuellar, Mexico
| | - Torres-Montero Jesús
- LADISER Inmunología y Biología Molecular, Facultad de Ciencias Químicas, Universidad Veracruzana, Orizaba, Mexico
| | | | - Ramos-Ligonio Angel
- LADISER Inmunología y Biología Molecular, Facultad de Ciencias Químicas, Universidad Veracruzana, Orizaba, Mexico.,Asociacion Chagas con Ciencia y Conocimiento A.C., Orizaba, Mexico
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5
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Becker I, Miranda-Ortiz H, Fernández-Figueroa EA, Sánchez-Montes S, Colunga-Salas P, Grostieta E, Juárez-Gabriel J, Lozano-Sardaneta YN, Arce-Fonseca M, Rodríguez-Morales O, Meneses-Ruíz G, Pastén-Sánchez S, López Martínez I, González-Guzmán S, Paredes-Cervantes V, Moreira OC, Finamore-Araujo P, Canseco-Méndez JC, Coquis-Navarrete U, Rengifo-Correa L, González-Salazar C, Alfaro-Cortés MM, Falcón-Lezama JA, Tapia-Conyer R, Stephens CR. The Low Variability of Tc24 in Trypanosoma cruzi TcI as an Advantage for Chagas Disease Prophylaxis and Diagnosis in Mexico. Pathogens 2023; 12:pathogens12030368. [PMID: 36986290 PMCID: PMC10057631 DOI: 10.3390/pathogens12030368] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Revised: 01/28/2023] [Accepted: 02/03/2023] [Indexed: 02/25/2023] Open
Abstract
(1) Background: Chagas disease is the main neglected tropical disease in America. It is estimated that around 6 million people are currently infected with the parasite in Latin America, and 25 million live in endemic areas with active transmission. The disease causes an estimated economic loss of USD 24 billion dollars annually, with a loss of 75,200 working years per year of life; it is responsible for around ~12,000 deaths annually. Although Mexico is an endemic country that recorded 10,186 new cases of Chagas disease during the period of 1990–2017, few studies have evaluated the genetic diversity of genes that could be involved in the prophylaxis and/or diagnosis of the parasite. One of the possible candidates proposed as a vaccine target is the 24 kDa trypomastigote excretory–secretory protein, Tc24, whose protection is linked to the stimulation of T. cruzi-specific CD8+ immune responses. (2) Methods: The aim of the present study was to evaluate the fine-scale genetic diversity and structure of Tc24 in T. cruzi isolates from Mexico, and to compare them with other populations reported in the Americas with the aim to reconsider the potential role of Tc24 as a key candidate for the prophylaxis and improvement of the diagnosis of Chagas disease in Mexico. (3) Results: Of the 25 Mexican isolates analysed, 48% (12) were recovered from humans and 24% (6) recovered from Triatoma barberi and Triatoma dimidiata. Phylogenetic inferences revealed a polytomy in the T. cruzi clade with two defined subgroups, one formed by all sequences of the DTU I and the other formed by DTU II–VI; both subgroups had high branch support. Genetic population analysis detected a single (monomorphic) haplotype of TcI throughout the entire distribution across both Mexico and South America. This information was supported by Nei’s pairwise distances, where the sequences of TcI showed no genetic differences. (4) Conclusions: Given that both previous studies and the findings of the present work confirmed that TcI is the only genotype detected from human isolates obtained from various states of Mexico, and that there is no significant genetic variability in any of them, it is possible to propose the development of in silico strategies for the production of antigens that optimise the diagnosis of Chagas disease, such as quantitative ELISA methods that use this region of Tc24.
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Affiliation(s)
- Ingeborg Becker
- Centro de Medicina Tropical, Unidad de Investigación en Medicina Experimental, Facultad de Medicina, Universidad Nacional Autónoma de México, Mexico City 04510, Mexico
- Correspondence: (I.B.); (C.R.S.)
| | - Haydee Miranda-Ortiz
- Unidad de Secuenciación, Instituto Nacional de Medicina Genómica, Mexico City 14610, Mexico
| | | | - Sokani Sánchez-Montes
- Centro de Medicina Tropical, Unidad de Investigación en Medicina Experimental, Facultad de Medicina, Universidad Nacional Autónoma de México, Mexico City 04510, Mexico
- Laboratorio de Diagnóstico, Facultad de Ciencias Biológicas y Agropecuarias Región Poza Rica-Tuxpan, Universidad Veracruzana, Tuxpan de Rodríguez Cano 92870, Mexico
| | - Pablo Colunga-Salas
- Centro de Medicina Tropical, Unidad de Investigación en Medicina Experimental, Facultad de Medicina, Universidad Nacional Autónoma de México, Mexico City 04510, Mexico
- Instituto de Biotecnología y Ecología Aplicada, Universidad Veracruzana, Xalapa de Enríquez 91090, Mexico
| | - Estefanía Grostieta
- Centro de Medicina Tropical, Unidad de Investigación en Medicina Experimental, Facultad de Medicina, Universidad Nacional Autónoma de México, Mexico City 04510, Mexico
| | - Javier Juárez-Gabriel
- Centro de Medicina Tropical, Unidad de Investigación en Medicina Experimental, Facultad de Medicina, Universidad Nacional Autónoma de México, Mexico City 04510, Mexico
- Laboratorio de Diagnóstico, Facultad de Ciencias Biológicas y Agropecuarias Región Poza Rica-Tuxpan, Universidad Veracruzana, Tuxpan de Rodríguez Cano 92870, Mexico
| | - Yokomi N. Lozano-Sardaneta
- Centro de Medicina Tropical, Unidad de Investigación en Medicina Experimental, Facultad de Medicina, Universidad Nacional Autónoma de México, Mexico City 04510, Mexico
| | - Minerva Arce-Fonseca
- Department of Molecular Biology, National Institute of Cardiology “Ignacio Chávez”, Mexico City 14080, Mexico
| | - Olivia Rodríguez-Morales
- Department of Molecular Biology, National Institute of Cardiology “Ignacio Chávez”, Mexico City 14080, Mexico
| | - Gabriela Meneses-Ruíz
- Departamento de Parasitología, Instituto de Diagnóstico y Referencia Epidemiológicos, Secretaría de Salud, Mexico City 01480, Mexico
| | - Sergio Pastén-Sánchez
- Departamento de Parasitología, Instituto de Diagnóstico y Referencia Epidemiológicos, Secretaría de Salud, Mexico City 01480, Mexico
| | - Irma López Martínez
- Departamento de Parasitología, Instituto de Diagnóstico y Referencia Epidemiológicos, Secretaría de Salud, Mexico City 01480, Mexico
| | - Saúl González-Guzmán
- Laboratorio del Banco Central de Sangre del Centro Médico Nacional “La Raza”, Instituto Mexicano del Seguro Social, Mexico City 02990, Mexico
- Departamento de Investigación, Hospital Regional de Alta Especialidad de Zumpango, Zumpango 55600, Mexico
| | - Vladimir Paredes-Cervantes
- Unidad de Investigación Médica en Inmunología e Infectología, Hospital de Infectología, Centro Médico Nacional “La Raza”, Instituto Mexicano del Seguro Social, Mexico City 02990, Mexico
| | - Otacilio C. Moreira
- Laboratorio de Biología Molecular e Doencas Endêmicas, Instituto Oswaldo Cruz, Fiocruz 21040900, RJ, Brazil
| | - Paula Finamore-Araujo
- Laboratorio de Biología Molecular e Doencas Endêmicas, Instituto Oswaldo Cruz, Fiocruz 21040900, RJ, Brazil
| | | | - Uriel Coquis-Navarrete
- Departamento de Genómica Poblacional, Instituto Nacional de Medicina Genómica, Mexico City 14610, Mexico
| | - Laura Rengifo-Correa
- Centro de Ciencias de la Complejidad, Universidad Nacional Autónoma de México, Mexico City 04510, Mexico
| | | | | | - Jorge A. Falcón-Lezama
- División Académica de Ciencias de la Salud, Universidad Juárez Autónoma de Tabasco, Villahermosa 86100, Mexico
| | - Roberto Tapia-Conyer
- Facultad de Medicina, Universidad Nacional Autónoma de México, Mexico City 04510, Mexico
| | - Christopher R. Stephens
- Centro de Ciencias de la Complejidad, Universidad Nacional Autónoma de México, Mexico City 04510, Mexico
- Correspondence: (I.B.); (C.R.S.)
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6
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Rangel-Gamboa L, González-Martínez EI, Sánchez-Cruz LC, Montiel-Rangel AI, Martínez-Hernández F. Trypanosoma cruzi DTU II coinfection with bacteria producing prolonged cutaneous lesion in a healthy young male. Rev Inst Med Trop Sao Paulo 2023; 65:e15. [PMID: 36921203 PMCID: PMC10013466 DOI: 10.1590/s1678-9946202365015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2022] [Accepted: 01/09/2023] [Indexed: 03/15/2023] Open
Abstract
Chagas disease (CD) is a neglected tropical disease caused by Trypanosoma cruzi and is genetically classified in six discrete typing units (DTUs). The isolates reported in Mexico are generally associated with DTU I. We presented a case of a prolonged cutaneous lesion in a Mexican man, caused by DTU II in coinfection with Bacillus velezensis and Corynebacterium sp. The patient assessment included a complete clinical history, physical exam, laboratory tests, and a skin biopsy. In the facial tissues, intracellular parasites were revealed. The PCR tests were positive for T. cruzi in tissue and blood samples. DNA satellite sequencing was correlated with the DTU II. The initial serological tests reported negative results. However, four months later, two serological tests reported positive results. These exams were performed in different health centers. Mexico is considered an endemic area for CD; nevertheless, this is just the second cutaneous case associated with a DTU different from DTU-I noted in this country. From an ecological point of view, this fact suggests a geographical expansion of DTU II and an association with atypical skin manifestations. Further studies should be conducted to understand this exciting association between DTU-II and prolonged cutaneous expression in humans.
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Affiliation(s)
- Lucia Rangel-Gamboa
- Hospital General Dr. Manuel Gea González, Departamento de Ecología de Agentes Patógenos, Ciudad de México, Mexico.,Luminox Skin Centre, Dermatologic Department, Ciudad de México, Mexico
| | - Erik-Iyair González-Martínez
- Hospital General Dr. Manuel Gea González, Departamento de Ecología de Agentes Patógenos, Ciudad de México, Mexico
| | | | | | - Fernando Martínez-Hernández
- Hospital General Dr. Manuel Gea González, Departamento de Ecología de Agentes Patógenos, Ciudad de México, Mexico
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7
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Fernández-Santos NA, Trujillo-García JC, Hamer SA, Wei L, Martínez-Montoya H, Tamez-Guerra P, Hamer GL, Rodríguez-Pérez MA. Domestic Triatoma spp. Infections with Trypanosoma cruzi, Household Infestations, and Molecular Identification in Oaxaca, México. INSECTS 2022; 13:1134. [PMID: 36555044 PMCID: PMC9785609 DOI: 10.3390/insects13121134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/19/2022] [Revised: 12/04/2022] [Accepted: 12/06/2022] [Indexed: 06/17/2023]
Abstract
In Latin America, Mexico is the country with the second highest annual estimated number of Chagas disease cases, caused by Trypanosoma cruzi, due to vector-borne transmission. The state of Oaxaca is the location of the first documented human cases of Chagas disease in Mexico and contained the highest T. cruzi seropositive rate (3.5%) from blood donors. Here, entomological surveys, from 2017 to 2019, were conducted to collect triatomines in 124 villages of 60 municipalities. Four principal domestic Triatoma spp. (Hemiptera: Triatominae), Triatoma phyllosoma, T. barberi, T. mazzotti, and T. dimidiata, of Oaxaca, Mexico were identified by morphology and molecular analysis of the barcode region of the cytochrome oxidase 1 (cox1 or COI or CO1) gene. A total of 41 out of 83 T. phyllosoma specimens examined by microscopy were positive for T. cruzi (49%), 49 out of 171 for T. barberi (28%), 31 out of 177 for T. mazzotti (17%), and none out of 10 for T. dimidiata (0%). Overall, the infestation index was 3.1% of households containing at least one triatomine; the crowding index was a mean of two Triatoma spp./household; and the colonization index was 0.38 for households based on presence of nymphs. Geographical distribution of triatomines in Oaxaca at the municipality level and endophilic behavior is also reported. Precise identification, endophilic habits, and infection rates of these triatomines are paramount for vector control programs of the Ministry of Health of Oaxaca and beyond.
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Affiliation(s)
- Nadia A. Fernández-Santos
- Instituto Politécnico Nacional, Centro de Biotecnología Genómica, Reynosa 88170, Mexico
- Department of Entomology, Texas A&M University, College Station, TX 77843, USA
| | | | - Sarah A. Hamer
- Department of Veterinary Integrative Biosciences, Texas A&M University, College Station, TX 77843, USA
| | - Lihua Wei
- Instituto Politécnico Nacional, Centro de Biotecnología Genómica, Reynosa 88170, Mexico
| | - Humberto Martínez-Montoya
- Laboratorio de Genética y Genómica Comparativa, Universidad Autónoma de Tamaulipas, Unidad Académica Multidisciplinaria Reynosa-Aztlán, Reynosa 88778, Mexico
| | - Patricia Tamez-Guerra
- Departamento de Microbiología e Inmunología, Facultad de Ciencias Biológicas (FCB), Universidad Autónoma de Nuevo León (UANL), San Nicolás de los Garza, N.L., Monterrey 66455, Mexico
| | - Gabriel L. Hamer
- Department of Entomology, Texas A&M University, College Station, TX 77843, USA
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8
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Parasitemia and Differential Tissue Tropism in Mice Infected with Trypanosoma cruzi Isolates Obtained from Meccus phyllosoma in the State of Oaxaca, Mexico. Pathogens 2022; 11:pathogens11101141. [PMID: 36297198 PMCID: PMC9607563 DOI: 10.3390/pathogens11101141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Revised: 09/20/2022] [Accepted: 09/28/2022] [Indexed: 11/06/2022] Open
Abstract
Trypanosoma cruzi is a parasite transmitted by the feces of triatomines. Many triatomine species are found in Mexico, and various T. cruzi variants have been isolated from these species, each showing very different virulence and cell tropism. The isolates were obtained from Meccus phyllosoma specimens in three localities in the state of Oaxaca, Mexico: Tehuantitla, Vixhana, and Guichivere. The virulence of each isolate was assessed by quantifying parasitemia, survival, and histopathologic findings. The lineage of each isolate was identified using the mini-exon gene. The expression of the tssa gene during infection was detected in the heart, esophagus, gastrocnemius, and brain. Our results show that the maximum post-infection parasitemia was higher for the Tehuantitla isolate. On genotyping, all isolates were identified as T. cruzi I. The amastigotes in the heart and gastrocnemius were verified for all isolates, but in the brain only for Tehuantitla and Vixhana. The tssa expression allowed us to detect T. cruzi isolates, for Tehuantitla, predominantly in the heart. For Vixhana, a higher tssa expression was detected in gastrocnemius, and for Guichivere, it was higher in the esophagus. Results show that virulence, tropism, and tssa expression can vary, even when the isolates are derived from the same vector species, in the same region, and at similar altitudes.
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Jaime LD, Aracely LM, Paulina OM, Dumonteil E, Barnabé C, Waleckx E, Hernández-Giles RG, Ramos-Ligonio A. Molecular Characterization of Four Mexican Isolates of Trypanosoma cruzi and Their Profile Susceptibility to Nifurtimox. Acta Parasitol 2022; 67:1584-1593. [PMID: 36029434 DOI: 10.1007/s11686-022-00608-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Accepted: 08/10/2022] [Indexed: 11/30/2022]
Abstract
PURPOSE The objective of this study was to molecularly characterize Mexican isolates of T. cruzi obtained from infected triatomine bugs (the vectors of T. cruzi) and to evaluate their susceptibility to Nifurtimox (NFX). METHODS Three isolates obtained from Triatoma dimidiata (collected in the State of Veracruz) and one isolate obtained from Triatoma bassolsae (collected in the State of Puebla) were molecularly characterized and the expression of genes associated with natural resistance to NFX was analyzed by qPCR. RESULTS Molecular characterization by PCR showed that isolates Zn3, Zn5, and SRB1 belong to the DTU TcI, while isolate Sum3 belongs to TcIV. The latter was also confirmed by sequencing of mitochondrial genes. Isolate Zn5 was the most sensitive to treatment with NFX (IC50, 6.8 μM), isolates SRB1 and Zn3 were partially resistant (IC50, 12.8 μM and 12.7 μM) and isolate Sum3 showed a high degree of resistance to NFX (IC50, 21.4 µM). We also found an association between decreased NTR1 or OYE gene expression with NFX resistance. CONCLUSION Our results also evidenced a high variability in the susceptibility to NFX of these T. cruzi isolates Central and Southeastern Mexico, suggesting the presence of naturally resistant isolates circulating in the country. These results have important implications for defining treatment policies for patients with Chagas disease.
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Affiliation(s)
- López-Domínguez Jaime
- LADISER de Inmunología y Biología Molecular, Facultad de Ciencias Químicas, Universidad Veracruzana, Edificio D, Prolongación de Oriente 6 #1009, Colonia Rafael Alvarado, C.P. 94340, 86039, Orizaba, Veracruz, Mexico.,Doctorado en Ciencias Biomédicas, Universidad Veracruzana, Xalapa, Veracruz, Mexico
| | - López-Monteon Aracely
- LADISER de Inmunología y Biología Molecular, Facultad de Ciencias Químicas, Universidad Veracruzana, Edificio D, Prolongación de Oriente 6 #1009, Colonia Rafael Alvarado, C.P. 94340, 86039, Orizaba, Veracruz, Mexico.,Asociacion Chagas con Ciencia y Conocimiento A.C., Orizaba, Veracruz, Mexico
| | - Ochoa-Martínez Paulina
- LADISER de Inmunología y Biología Molecular, Facultad de Ciencias Químicas, Universidad Veracruzana, Edificio D, Prolongación de Oriente 6 #1009, Colonia Rafael Alvarado, C.P. 94340, 86039, Orizaba, Veracruz, Mexico.,Doctorado en Ciencias Biomédicas, Universidad Veracruzana, Xalapa, Veracruz, Mexico
| | - Eric Dumonteil
- Department of Tropical Medicine, Tulane University, School of Public Health and Tropical Medicine, New Orleans, LA, USA
| | - Christian Barnabé
- Institut de Recherche pour le Développement, UMR INTERTRYP IRD, CIRAD, Université de Montpellier, Montpellier, France
| | - Etienne Waleckx
- Asociacion Chagas con Ciencia y Conocimiento A.C., Orizaba, Veracruz, Mexico.,Institut de Recherche pour le Développement, UMR INTERTRYP IRD, CIRAD, Université de Montpellier, Montpellier, France.,Laboratorio de Parasitología, Centro de Investigaciones Regionales "Dr. Hideyo Noguchi", Universidad Autónoma de Yucatán, Mérida, Yucatán, Mexico
| | - Rubén Gustavo Hernández-Giles
- LADISER de Inmunología y Biología Molecular, Facultad de Ciencias Químicas, Universidad Veracruzana, Edificio D, Prolongación de Oriente 6 #1009, Colonia Rafael Alvarado, C.P. 94340, 86039, Orizaba, Veracruz, Mexico.,Maestría en Ciencias en Procesos Biológicos, Facultad de Ciencias Químicas, Universidad Veracruzana, Orizaba, Veracruz, Mexico
| | - Angel Ramos-Ligonio
- LADISER de Inmunología y Biología Molecular, Facultad de Ciencias Químicas, Universidad Veracruzana, Edificio D, Prolongación de Oriente 6 #1009, Colonia Rafael Alvarado, C.P. 94340, 86039, Orizaba, Veracruz, Mexico. .,Asociacion Chagas con Ciencia y Conocimiento A.C., Orizaba, Veracruz, Mexico.
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10
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Benítez-Villa GE, López-Monteon A, Waleckx E, Dumonteil E, Márquez-Fernández AJ, Rovirosa-Hernández MJ, Orduña-García F, Guzmán-Gómez D, Ramos-Ligonio A. Presence of Anti-T. cruzi Antibodies in Inhabitants and Dogs of Two Rural Settlements in the Sierra de Los Tuxtlas, Veracruz, Mexico. Acta Parasitol 2022; 67:1136-1144. [PMID: 35536427 DOI: 10.1007/s11686-022-00557-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2022] [Accepted: 04/12/2022] [Indexed: 11/30/2022]
Abstract
PURPOSE The aim of this study was to identify the risk factors associated with house infestation by Triatoma dimidiata as well as with Trypanosoma cruzi infection in humans and owned dogs in two rural communities from the municipality of Catemaco, Veracruz, Mexico. METHODS One hundred and 16 human blood samples and 34 dog blood samples were collected. The presence of anti-T. cruzi antibodies was determined using four different ELISA assays. Moreover, reactive ELISA sera from humans and dogs were processed by indirect immunofluorescence (IFI) to confirm the presence of anti-T. cruzi antibodies. RESULTS Serologic tests for T. cruzi infection showed a prevalence of 5.1% (6/116) in humans and of 50% (17/34) in owned dogs. CONCLUSION The presence of animals (dogs, chickens and wild animals), as well as some characteristics of house construction were identified as risk factors for infestation and infection. Complementary studies must be carried out to allow a better understanding of the transmission dynamics in the state of Veracruz, Mexico, and the implementation of adequate control programs.
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Affiliation(s)
- G E Benítez-Villa
- Doctorado en Ciencias Biomédicas, Universidad Veracruzana, Xalapa, Veracruz, México
| | - A López-Monteon
- LADISER Inmunología y Biología Molecular, Facultad de Ciencias Químicas, Universidad Veracruzana, Orizaba, Veracruz, México
| | - E Waleckx
- Laboratorio de Parasitología, Centro de Investigaciones Regionales "Dr. Hideyo Noguchi", Universidad Autónoma de Yucatán, Calle 43 #613 x 96, Colonia Inalámbrica, C.P. 97225, Mérida, Yucatán, Mexico
- Institut de Recherche Pour Le Développement, UMR INTERTRYP IRD, CIRAD, Université de Montpellier, Campus international de Baillarguet, 34398, Montpellier, France
| | - E Dumonteil
- Department of Tropical Medicine, School of Public Health and Tropical Medicine, Tulane University, New Orleans, LA, USA
| | - A J Márquez-Fernández
- LADISER Inmunología y Biología Molecular, Facultad de Ciencias Químicas, Universidad Veracruzana, Orizaba, Veracruz, México
| | | | - F Orduña-García
- Instituto de Neuroetología, Universidad Veracruzana, Xalapa, Veracruz, México
| | - D Guzmán-Gómez
- LADISER Inmunología y Biología Molecular, Facultad de Ciencias Químicas, Universidad Veracruzana, Orizaba, Veracruz, México
| | - A Ramos-Ligonio
- LADISER Inmunología y Biología Molecular, Facultad de Ciencias Químicas, Universidad Veracruzana, Orizaba, Veracruz, México.
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11
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Trypanosoma cruzi, beyond the dogma of non-infection in birds. INFECTION, GENETICS AND EVOLUTION : JOURNAL OF MOLECULAR EPIDEMIOLOGY AND EVOLUTIONARY GENETICS IN INFECTIOUS DISEASES 2022; 99:105239. [PMID: 35144004 DOI: 10.1016/j.meegid.2022.105239] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2021] [Revised: 01/18/2022] [Accepted: 02/04/2022] [Indexed: 12/31/2022]
Abstract
Trypanosoma cruzi is a protozoan parasite responsible for Chagas disease affecting seven million people. The disease cycle is maintained between Triatominae insects and Mammalia hosts; a refractory effect against infection was noted in birds, but only verified in poultry. This paper presents a new host record for T. cruzi, the American barn-owl (Tyto furcata). Trypanosoma cruzi DTU II molecular evidence was found in heart, intestine, liver, and breast suggesting an established chronic infection based on the parasite DNA presence in multiple organs but absent in spleen, as in the murine model and chronically infected raccoons (Procyon lotor). For birds, the parasite rejection was explained based on the complement and high body temperature, but these mechanisms vary greatly among the members of the avian class. Therefore, there is a need to investigate whether more bird species can become infected, and if T. furcata has a role in disseminating, transmitting and/or maintaining the parasite.
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12
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Dean DA, Gautham G, Siqueira-Neto JL, McKerrow JH, Dorrestein PC, McCall LI. Spatial metabolomics identifies localized chemical changes in heart tissue during chronic cardiac Chagas Disease. PLoS Negl Trop Dis 2021; 15:e0009819. [PMID: 34606502 PMCID: PMC8516257 DOI: 10.1371/journal.pntd.0009819] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Revised: 10/14/2021] [Accepted: 09/17/2021] [Indexed: 12/12/2022] Open
Abstract
Chagas disease (CD), caused by the parasite Trypanosoma cruzi, is one of nineteen neglected tropical diseases. CD is a vector-borne disease transmitted by triatomines, but CD can also be transmitted through blood transfusions, organ transplants, T. cruzi-contaminated food and drinks, and congenital transmission. While endemic to the Americas, T. cruzi infects 7–8 million people worldwide and can induce severe cardiac symptoms including apical aneurysms, thromboembolisms and arrhythmias during the chronic stage of CD. However, these cardiac clinical manifestations and CD pathogenesis are not fully understood. Using spatial metabolomics (chemical cartography), we sought to understand the localized impact of chronic CD on the cardiac metabolome of mice infected with two divergent T. cruzi strains. Our data showed chemical differences in localized cardiac regions upon chronic T. cruzi infection, indicating that parasite infection changes the host metabolome at specific sites in chronic CD. These sites were distinct from the sites of highest parasite burden. In addition, we identified acylcarnitines and glycerophosphocholines as discriminatory chemical families within each heart region, comparing infected and uninfected samples. Overall, our study indicated global and positional metabolic differences common to infection with different T. cruzi strains and identified select infection-modulated pathways. These results provide further insight into CD pathogenesis and demonstrate the advantage of a systematic spatial perspective to understand infectious disease tropism. Chagas disease (CD) is a tropical disease caused by the parasite Trypanosoma cruzi. CD originated in the Americas but is now found globally due to population movements. CD is transmitted through a triatomine vector, organ transplants, blood transfusions, T. cruzi-contaminated food and drinks, and congenitally. It occurs in two stages, an acute stage (usually asymptomatic) and a chronic stage. Twenty to thirty percent of chronic stage cases present severe cardiac symptoms such as heart failure, localized aneurysms and cardiomyopathy. Unfortunately, what causes severe cardiac symptoms in some individuals in chronic CD is not fully understood. Therefore, we used liquid chromatography-tandem mass spectrometry to analyze the heart tissue of chronically T. cruzi-infected and uninfected mice, to understand the impact of infection on the tissue metabolome. We identified discriminatory small molecules related to T. cruzi infection and determined that regions with the highest parasite burden are distinct from the regions with the largest changes in overall metabolite profile. These locations of high metabolic perturbation provide a molecular mechanism to explain why localized cardiac symptoms occur in CD, particularly at the heart apex. Overall, our work gives insight into chronic cardiac CD symptom development and shapes a framework for novel CD treatment.
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Affiliation(s)
- Danya A. Dean
- Department of Chemistry and Biochemistry, University of Oklahoma, Norman, Oklahoma, United States of America
- Laboratories of Molecular Anthropology and Microbiome Research, University of Oklahoma, Norman, Oklahoma, United States of America
| | - Gautham Gautham
- Laboratories of Molecular Anthropology and Microbiome Research, University of Oklahoma, Norman, Oklahoma, United States of America
- Department of Biology, University of Oklahoma, Norman, Oklahoma, United States of America
| | - Jair L. Siqueira-Neto
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California San Diego, La Jolla, California, United States of America
| | - James H. McKerrow
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California San Diego, La Jolla, California, United States of America
| | - Pieter C. Dorrestein
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California San Diego, La Jolla, California, United States of America
- Center for Microbiome Innovation, University of California San Diego, La Jolla, California, United States of America
- Collaborative Mass Spectrometry Innovation Center, University of California San Diego, La Jolla, California, United States of America
| | - Laura-Isobel McCall
- Department of Chemistry and Biochemistry, University of Oklahoma, Norman, Oklahoma, United States of America
- Laboratories of Molecular Anthropology and Microbiome Research, University of Oklahoma, Norman, Oklahoma, United States of America
- Department of Microbiology and Plant Biology, University of Oklahoma, Norman, Oklahoma, United States of America
- * E-mail:
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13
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Diversity of Trypanosoma cruzi parasites infecting Triatoma dimidiata in Central Veracruz, Mexico, and their One Health ecological interactions. INFECTION GENETICS AND EVOLUTION 2021; 95:105050. [PMID: 34450293 DOI: 10.1016/j.meegid.2021.105050] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Revised: 08/17/2021] [Accepted: 08/21/2021] [Indexed: 01/21/2023]
Abstract
Triatoma dimidiata is the main vector of Trypanosoma cruzi parasites in Veracruz, Mexico, and its association with human housing appears variable. Also, in spite of a high seroprevalence of T. cruzi infection in humans, parasite transmission remains poorly understood. Therefore, we aimed to identify T. dimidiata blood feeding sources and its parasite and microbial diversity to reconstruct T. cruzi parasite transmission ecology in central Veracruz, Mexico, within a One Health/Ecohealth framework. We used a metabarcoding and deep sequencing approach of specific markers for the simultaneous identification of T. dimidiata haplogroup (ITS-2), vertebrate blood meals (12 s gene), T. cruzi parasites (mini-exon gene), and gut microbiota (bacterial 16 s). Twelve species of domestic/synanthropic animals and humans were identified as blood sources, with multiple feeding on 4.2 ± 0.4 hosts per bug. The feeding/parasite transmission network was strongly centered on humans, emphasizing a significant risk of infection. We also unambiguously confirmed the presence of TcI, TcII, TcV and TcVI DTUs in T. dimidiata, and sequences from Veracruz tended to cluster apart from parasites from other regions, suggesting some level of local differentiation. Analysis of T. dimidiata microbiota suggested that several bacterial families may be associated with the presence/absence of T. cruzi, and some of these associations may also be parasite DTU-specific. Such integrative approaches within the EcoHealth/One Health framework provide key insights on T. cruzi transmission and potential novel strategies for disease control.
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14
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Polonio R, López-Domínguez J, Herrera C, Dumonteil E. Molecular ecology of Triatoma dimidiata in southern Belize reveals risk for human infection and the local differentiation of Trypanosoma cruzi parasites. Int J Infect Dis 2021; 108:320-329. [PMID: 34098097 DOI: 10.1016/j.ijid.2021.05.083] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Revised: 05/21/2021] [Accepted: 05/31/2021] [Indexed: 12/13/2022] Open
Abstract
OBJECTIVE In Belize, the main vector for Trypanosoma cruzi, the agent of Chagas disease, is Triatoma dimidiata, but transmission cycles and the risk for human infection are unclear. Therefore, the aim of this study was to identify T. dimidiata blood feeding sources and its parasite and microbial diversity, in order to reconstruct T. cruzi parasite transmission ecology in southern Belize. METHODS A metabarcoding approach based on deep sequencing of markers was used for bug taxonomy, blood meal sources, T. cruzi genotypes, and microbiota composition. Bugs were collected in 13 villages of Toledo district. RESULTS Bugs fed on at least 13 species, from domestic hosts such as humans, dogs, cows, and pigs, to synanthropic species such as mice, rats, and opossums, and sylvatic species such as deer, peccary, and kinkajou, in agreement with an opportunistic feeding behavior. Nonetheless, most feeding focused on a few species, including humans. Infection with T. cruzi was detected in 24 of 39 bugs (62%), and the analysis of 242 T. cruzi mini-exon sequences (average 10 ± 5 haplotypes per bug) indicated the presence of TcI and TcIV parasite discrete typing units (DTUs). However, for both DTUs, sequences from Belize mostly clustered apart from sequences from North and South America, suggesting the local differentiation of parasites. T. dimidiata also harbored a diverse bacterial microbiota, with ontogenic changes suggesting microbiota maturation during nymphal development. CONCLUSIONS Together, these results indicate a significant risk for T. cruzi infection in humans. They also highlight the need to better characterize the diversity of T. cruzi strains in the region and its impact on disease epidemiology.
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Affiliation(s)
- Roy Polonio
- University of Belize, Punta Gorda, Toledo, Belize
| | - Jaime López-Domínguez
- Department of Tropical Medicine, School of Public Health and Tropical Medicine, Vector-Borne and Infectious Disease Research Center, Tulane University, New Orleans, LA, USA; LADISER Inmunología y Biología Molecular, Facultad de Ciencias Químicas, Universidad Veracruzana, Orizaba, Veracruz, Mexico; Centro de Investigaciones Biomédicas, Universidad Veracruzana, Xalapa, Veracruz, Mexico
| | - Claudia Herrera
- Department of Tropical Medicine, School of Public Health and Tropical Medicine, Vector-Borne and Infectious Disease Research Center, Tulane University, New Orleans, LA, USA
| | - Eric Dumonteil
- Department of Tropical Medicine, School of Public Health and Tropical Medicine, Vector-Borne and Infectious Disease Research Center, Tulane University, New Orleans, LA, USA.
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15
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Guzmán-Gómez D, Salas-González G, López-Monteon A, Welsh-Rodríguez CM, Torres-Montero J, Dumonteil E, Waleckx E, Ramos-Ligonio A. Risk factors for infestation by Triatoma dimidiata in a rural locality of Veracruz, Mexico, with active transmission of Trypanosoma cruzi: weather and rain as factors. Trop Med Int Health 2021; 26:916-926. [PMID: 33860616 DOI: 10.1111/tmi.13589] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
OBJECTIVE To analyse the ecological and social factors involved in infestation of houses by Triatoma dimidiata in a rural locality of Veracruz, Mexico, where active transmission of the parasite is occurring. METHODS A survey was applied to the households of the locality to obtain sociodemographic data. In parallel, T. dimidiata insects were collected during one year through community participation. Using PCR, the insects were genotyped, their infection status was assessed, and parasite genotypes infecting the insects were identified. The vector's blood meal sources were identified using a polymerase-heteroduplex chain reaction assay. RESULTS Seasonal variations in the patterns of infestation by T. dimidiata were observed. An overall infestation rate of 19.46%, a colonisation index of 9.09%, a dispersion rate of 22.15% and a synanthropy index of 80.6% were found. The collected insects were identified as ITS-2 group 2 insects, and a natural infection with T. cruzi of 54.35% was found. TcI and no-TcI genotypes of T. cruzi were found in infected insects. Factors such as rain (P = 0.0006) and temperature (P < 0.0001) were associated with infestation. Analysis of the blood meal sources indicated frequent feeding upon humans and mice. Furthermore, house materials and peridomiciles were found to play an important role in the dynamics of infestation. CONCLUSIONS The contribution of this study is important for understanding the epidemiology of Chagas disease in rural areas of the state of Veracruz and will help to the establishment of an entomological surveillance system and implementation of prevention and control measures in accordance with the reality of the area.
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Affiliation(s)
- Daniel Guzmán-Gómez
- LADISER Inmunología y Biología Molecular, Facultad de Ciencias Químicas, Universidad Veracruzana, Veracruz, México
| | | | - Aracely López-Monteon
- LADISER Inmunología y Biología Molecular, Facultad de Ciencias Químicas, Universidad Veracruzana, Veracruz, México
| | | | - Jesús Torres-Montero
- LADISER Inmunología y Biología Molecular, Facultad de Ciencias Químicas, Universidad Veracruzana, Veracruz, México
| | - Eric Dumonteil
- Department of Tropical Medicine, Tulane University, New Orleans, USA
| | - Etienne Waleckx
- Institut de Recherche pour le Développement, UMR INTERTRYP IRD, CIRAD, Université de Montpellier, Montpellier, France.,Laboratorio de Parasitología, Centro de Investigaciones Regionales "Dr. Hideyo Noguchi", Universidad Autónoma de Yucatán, Mérida, México
| | - Angel Ramos-Ligonio
- LADISER Inmunología y Biología Molecular, Facultad de Ciencias Químicas, Universidad Veracruzana, Veracruz, México
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16
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Dumonteil E, Pronovost H, Bierman EF, Sanford A, Majeau A, Moore R, Herrera C. Interactions among Triatoma sanguisuga blood feeding sources, gut microbiota and Trypanosoma cruzi diversity in southern Louisiana. Mol Ecol 2020; 29:3747-3761. [PMID: 32749727 DOI: 10.1111/mec.15582] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Revised: 07/20/2020] [Accepted: 07/27/2020] [Indexed: 12/15/2022]
Abstract
Integrating how biodiversity and infectious disease dynamics are linked at multiple levels and scales is highly challenging. Chagas disease is a vector-borne disease, with specificities of the triatomine vectors and Trypanosoma cruzi parasite life histories resulting in a complex multihost and multistrain life cycle. Here, we tested the hypothesis that T. cruzi transmission cycles are shaped by triatomine host communities and gut microbiota composition by comparing the integrated interactions of Triatoma sanguisuga in southern Louisiana with feeding hosts, T. cruzi parasite and bacterial microbiota in two habitats. Bugs were collected from resident's houses and animal shelters and analysed for genetic structure, blood feeding sources, T. cruzi parasites, and bacterial diversity by PCR amplification of specific DNA markers followed by next-generation sequencing, in an integrative metabarcoding approach. T. sanguisuga feeding host communities appeared opportunistic and defined by host abundance in each habitat, yielding distinct parasite transmission networks among hosts. The circulation of a large diversity of T. cruzi DTUs was also detected, with TcII and TcV detected for the first time in triatomines in the US. The bacterial microbiota was highly diverse and varied significantly according to the DTU infecting the bugs, indicating specific interactions among them in the gut. Expanding such studies to multiple habitats and additional triatomine species would be key to further refine our understanding of the complex life cycles of multihost, multistrain parasites such as T. cruzi, and may lead to improved disease control strategies.
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Affiliation(s)
- Eric Dumonteil
- Department of Tropical Medicine, School of Public Health and Tropical Medicine, and Vector-Borne and Infectious Disease Research Center, Tulane University, New Orleans, LA, USA
| | - Henry Pronovost
- Department of Tropical Medicine, School of Public Health and Tropical Medicine, and Vector-Borne and Infectious Disease Research Center, Tulane University, New Orleans, LA, USA
| | - Eli F Bierman
- Department of Tropical Medicine, School of Public Health and Tropical Medicine, and Vector-Borne and Infectious Disease Research Center, Tulane University, New Orleans, LA, USA
| | - Anna Sanford
- Department of Tropical Medicine, School of Public Health and Tropical Medicine, and Vector-Borne and Infectious Disease Research Center, Tulane University, New Orleans, LA, USA
| | - Alicia Majeau
- Department of Tropical Medicine, School of Public Health and Tropical Medicine, and Vector-Borne and Infectious Disease Research Center, Tulane University, New Orleans, LA, USA
| | - Ryan Moore
- Department of Tropical Medicine, School of Public Health and Tropical Medicine, and Vector-Borne and Infectious Disease Research Center, Tulane University, New Orleans, LA, USA
| | - Claudia Herrera
- Department of Tropical Medicine, School of Public Health and Tropical Medicine, and Vector-Borne and Infectious Disease Research Center, Tulane University, New Orleans, LA, USA
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Prevalence and Epitope Recognition of Anti- Trypanosoma cruzi Antibodies in Two Procyonid Species: Implications for Host Resistance. Pathogens 2020; 9:pathogens9060464. [PMID: 32545481 PMCID: PMC7350377 DOI: 10.3390/pathogens9060464] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Revised: 06/01/2020] [Accepted: 06/10/2020] [Indexed: 12/15/2022] Open
Abstract
More than 180 mammalian species have been found naturally infected with Trypanosoma cruzi. Many of them play an important role in the maintenance of this parasite. In particular, new studies have appeared which indicate that some species of Procyonidae family may play a role as T. cruzi hosts, however, more data are needed to evaluate their long-term physiological response to parasite infection, especially for specific antibodies. In this study, antibodies to T. cruzi were detected and prevalence and epitope recognition were assessed by ELISA (using discrete typing unit (DTU) I as antigen) and WB (using DTU I and DTU II as antigens) and sera from two procyonid species obtained through five-year follow-up of two semicaptive populations living in the same habitat. Marked heterogeneity in antigens recognition between species and differences in seroprevalence (p = 0.0002) between white-nosed coatis (Nasua narica), 51.8% (115/222), and common raccoons (Procyon lotor), 28.3% (23/81), were found. Antigens with high molecular weight when DTU-I was used were the most recognized, while a greater antigen diversity recognition was observed with DTU-II; for white-nosed coatis, low-molecular-weight antigens were mainly recognized, while for common raccoons proteins with molecular weights greater than 80 kDa were recognized most. These divergent humoral immune responses could be related to an alleged pattern of recognition receptors and major histocompatibility complex molecules difference in the procyonids species.
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18
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Herrera C, Truyens C, Dumonteil E, Alger J, Sosa-Estani S, Cafferata ML, Gibbons L, Ciganda A, Matute ML, Zuniga C, Carlier Y, Buekens P. Phylogenetic Analysis of Trypanosoma cruzi from Pregnant Women and Newborns from Argentina, Honduras, and Mexico Suggests an Association of Parasite Haplotypes with Congenital Transmission of the Parasite. J Mol Diagn 2019; 21:1095-1105. [PMID: 31450011 DOI: 10.1016/j.jmoldx.2019.07.004] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Revised: 06/26/2019] [Accepted: 07/25/2019] [Indexed: 12/20/2022] Open
Abstract
Trypanosoma cruzi, the causative agent of Chagas disease, exhibits a high genetic variability and has been classified into six discrete typing units (DTUs) named TcI through TcVI. This genetic diversity is believed to be associated with clinical characteristics and outcomes, but evidence supporting such associations has been limited. Herein, we performed a phylogenetic analysis of T. cruzi sequences of the mini-exon intergenic region obtained from a large cohort of pregnant women and newborns from Argentina, Honduras, and Mexico, to assess parasite genetic diversity and possible associations with congenital transmission. Analysis of 105 samples (including five paired samples) from maternal and umbilical cord blood indicated that T. cruzi DTU distribution was similar among pregnant women and newborns from these three countries, with a high frequency of TcII-TcV-TcVI DTUs, including mixed infections with TcI. However, phylogenetic analysis revealed that although the same parasite haplotypes circulated in these three countries, they were present at different frequencies, leading to significant geographic differences. Of importance, a strong association was observed between parasite haplotypes and congenital infection of newborns. Thus, the identification of parasite haplotypes in pregnant women, but not of parasite DTUs, may help predict congenital transmission of T. cruzi.
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Affiliation(s)
- Claudia Herrera
- Tulane University School of Public Health and Tropical Medicine, New Orleans, Louisiana.
| | | | - Eric Dumonteil
- Tulane University School of Public Health and Tropical Medicine, New Orleans, Louisiana; Centro de Investigaciones Regionales Dr. Hideyo Noguchi, Universidad Autonoma de Yucatan, Merida, Mexico
| | - Jackeline Alger
- Instituto de Enfermedades Infecciosas y Parasitologia Antonio Vidal, Tegucigalpa, Honduras; Hospital Escuela Universitario, Facultad de Ciencias Medicas, Universidad Nacional Autonoma de Honduras, Tegucigalpa, Honduras
| | - Sergio Sosa-Estani
- Instituto de Efectividad Clínica y Sanitaria, Buenos Aires, Argentina; Instituto Nacional de Parasitología "Dr. Mario Fatala Chaben,", Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Administracion Nacional de Laboratorios e Institutos de Salud "Dr. Carlos G. Malbran" (ANLIS), Buenos Aires, Argentina
| | - Maria L Cafferata
- Instituto de Efectividad Clínica y Sanitaria, Buenos Aires, Argentina; Unidad de Investigacion Clinica y Epidemiologica Montevideo, Montevideo, Uruguay
| | - Luz Gibbons
- Instituto de Efectividad Clínica y Sanitaria, Buenos Aires, Argentina
| | - Alvaro Ciganda
- Unidad de Investigacion Clinica y Epidemiologica Montevideo, Montevideo, Uruguay
| | - Maria L Matute
- Laboratorio Nacional de Vigilancia de la Salud, Secretaria de Salud de Honduras, Tegucigalpa, Honduras
| | - Concepcion Zuniga
- Instituto de Enfermedades Infecciosas y Parasitologia Antonio Vidal, Tegucigalpa, Honduras; Hospital Escuela Universitario, Facultad de Ciencias Medicas, Universidad Nacional Autonoma de Honduras, Tegucigalpa, Honduras
| | - Yves Carlier
- Tulane University School of Public Health and Tropical Medicine, New Orleans, Louisiana; Université Libre de Bruxelles, Brussels, Belgium
| | - Pierre Buekens
- Tulane University School of Public Health and Tropical Medicine, New Orleans, Louisiana
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19
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Barbosa CG, Gómez-Hernández C, Rezende-Oliveira K, Da Silva MV, Rodrigues JPF, Tiburcio MGS, Ferreira TB, Rodrigues V, Yoshida N, Ramirez LE. Oral infection of mice and host cell invasion by Trypanosoma cruzi strains from Mexico. Parasitol Res 2019; 118:1493-1500. [PMID: 30847614 DOI: 10.1007/s00436-019-06254-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2018] [Accepted: 02/05/2019] [Indexed: 12/20/2022]
Abstract
Oral infection by Trypanosoma cruzi has been responsible for frequent outbreaks of acute Chagas disease in the north of South America and in the Amazon region, where T. cruzi genetic group TcI predominates. TcI strains from different geographical regions have been used in oral infection in mice, but there is no information about strains from Mexico where TcI is prevalent. Here, we analyzed four Mexican strains as concerns the course of oral infection, the ability to invade host cells in vitro, and the profile of metacyclic trypomastigote surface molecules gp82 and gp90 that are implicated in parasite internalization. Oral infection of mice with metacyclic forms of all strains resulted in reduced blood and tissue parasitism, and mild to moderate inflammatory process in the heart/skeletal muscle. They expressed pepsin-resistant gp82 and gp90 molecules at high levels and invaded host cells poorly in full nutrient medium and efficiently under nutrient-deprived condition. The properties exhibited by Mexican strains were similar to those displayed by TcI strains from other geographical regions, reinforcing the notion that these features are common to the genetic group TcI as a whole.
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Affiliation(s)
- Cecilia G Barbosa
- Universidade Federal do Triângulo Mineiro, Rua Getúlio Guaritá S/N, Bairro Abadia, Uberaba, Minas Gerais, 38025-180, Brazil
| | - César Gómez-Hernández
- Universidade Federal do Triângulo Mineiro, Rua Getúlio Guaritá S/N, Bairro Abadia, Uberaba, Minas Gerais, 38025-180, Brazil.
| | | | - Marcos Vinicius Da Silva
- Universidade Federal do Triângulo Mineiro, Rua Getúlio Guaritá S/N, Bairro Abadia, Uberaba, Minas Gerais, 38025-180, Brazil
| | | | - Monique G S Tiburcio
- Universidade Federal do Triângulo Mineiro, Rua Getúlio Guaritá S/N, Bairro Abadia, Uberaba, Minas Gerais, 38025-180, Brazil
| | - Thatiane Bragini Ferreira
- Universidade Federal do Triângulo Mineiro, Rua Getúlio Guaritá S/N, Bairro Abadia, Uberaba, Minas Gerais, 38025-180, Brazil
| | - Virmondes Rodrigues
- Universidade Federal do Triângulo Mineiro, Rua Getúlio Guaritá S/N, Bairro Abadia, Uberaba, Minas Gerais, 38025-180, Brazil
| | | | - Luis E Ramirez
- Universidade Federal do Triângulo Mineiro, Rua Getúlio Guaritá S/N, Bairro Abadia, Uberaba, Minas Gerais, 38025-180, Brazil
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20
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Villanueva-Lizama L, Teh-Poot C, Majeau A, Herrera C, Dumonteil E. Molecular Genotyping of Trypanosoma cruzi by Next-Generation Sequencing of the Mini-Exon Gene Reveals Infections With Multiple Parasite Discrete Typing Units in Chagasic Patients From Yucatan, Mexico. J Infect Dis 2019; 219:1980-1988. [DOI: 10.1093/infdis/jiz047] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2018] [Accepted: 01/25/2019] [Indexed: 12/19/2022] Open
Affiliation(s)
- Liliana Villanueva-Lizama
- Laboratorio de Parasitologia, Centro de Investigaciones Regionales “Dr. Hideyo Noguchi,” Universidad Autonoma de Yucatan, Merida, Mexico
| | - Christian Teh-Poot
- Laboratorio de Parasitologia, Centro de Investigaciones Regionales “Dr. Hideyo Noguchi,” Universidad Autonoma de Yucatan, Merida, Mexico
| | - Alicia Majeau
- Department of Tropical Medicine, School of Public Health and Tropical Medicine
- Vector-Borne and Infectious Disease Research Center, Tulane University, New Orleans, Louisiana
| | - Claudia Herrera
- Department of Tropical Medicine, School of Public Health and Tropical Medicine
- Vector-Borne and Infectious Disease Research Center, Tulane University, New Orleans, Louisiana
| | - Eric Dumonteil
- Department of Tropical Medicine, School of Public Health and Tropical Medicine
- Vector-Borne and Infectious Disease Research Center, Tulane University, New Orleans, Louisiana
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21
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Dario MA, Andrade TES, Dos Santos CB, Fux B, Brandão AA, Falqueto A. Molecular characterization of Trypanosoma cruzi samples derived from Triatoma vitticeps and Panstrongylus geniculatus of the Atlantic rainforest, southeast Brazil. ACTA ACUST UNITED AC 2018; 25:59. [PMID: 30474600 PMCID: PMC6254102 DOI: 10.1051/parasite/2018060] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2018] [Accepted: 11/06/2018] [Indexed: 01/04/2023]
Abstract
Background: In rural areas of Espírito Santo state, southeast Brazil, triatomine species attracted by light frequently invade residences. The aim of this study was to investigate the Trypanosoma cruzi discrete typing units (DTUs) harbored by these triatomines. Methods: Triatomine’s intestinal contents were examined, inoculated in mice, and the positive samples were cultivated. Flagellates obtained from infected mice hemoculture were submitted to DNA extraction using a salting-out method and to TcSC5D gene amplification. The amplified samples were sequenced, and polymorphism was analyzed for DTU identification. Results: Three hundred and ninety-four triatomines were identified: Triatoma vitticeps (90.03%), Panstrongylus geniculatus (8.89%), Panstrongylus megistus (0.54%), Panstrongylus diasi (0.27%), and Triatoma tibiamaculata (0.27%). Among the specimens, 251/394 (67.65%) presented flagellated forms similar to T. cruzi. After triatomine intestinal content inoculation into mice, 134 mice presented T. cruzi-like trypomastigotes from Tr. vitticeps and P. geniculatus and 89 samples were positive in hemoculture. Sixty-two samples were analyzed for the TcSC5D gene and TcI, TcII, TcIII, and TcIV DTUs were identified. Conclusions: We observed T. cruzi DTU diversity in Tr. vitticeps and P. geniculatus, which showed the predominance of TcII and occurrence of TcI, TcIII and TcIV. Triatomines presented high T. cruzi infection rates. Since little is known regarding the possible mammalian hosts that maintain the T. cruzi cycle, further studies are necessary to obtain a better understanding of the parasite transmission cycle in this region.
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Affiliation(s)
- Maria Augusta Dario
- Unidade de Medicina Tropical, Universidade Federal do Espírito Santo (UFES), Av. Marechal Campos, 1468, Vitória, ES 29043-900, Brazil
| | | | - Claudiney Biral Dos Santos
- Núcleo de Entomologia e Malacologia, Secretaria de estado da Saúde (SESA/ES), Rua Pedro Zangradini, 320, Serra, ES 29164-020, Brazil
| | - Blima Fux
- Unidade de Medicina Tropical, Universidade Federal do Espírito Santo (UFES), Av. Marechal Campos, 1468, Vitória, ES 29043-900, Brazil
| | - Adeilton Alves Brandão
- Laboratório Interdisciplinar em Pesquisas Médicas, Instituto Oswaldo Cruz/Fiocruz, Av. Brasil, 4365, Rio de Janeiro, RJ 21040-900, Brazil
| | - Aloísio Falqueto
- Unidade de Medicina Tropical, Universidade Federal do Espírito Santo (UFES), Av. Marechal Campos, 1468, Vitória, ES 29043-900, Brazil
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22
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López-Vivas FI, Vázquez-Chagoyán JC, Acosta-Dibarrat JP, Medina-Torres I, Diaz-Albiter HM, Fernández-Rosas P, de Oca-Jiménez RM. Molecular Characterization of Trypanosoma cruzi in Infected Meccus pallidipennis in the Southern Region of the State of Mexico, Mexico. Vector Borne Zoonotic Dis 2018; 18:683-689. [PMID: 30183555 DOI: 10.1089/vbz.2018.2287] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
PCR amplification and sequencing of Trypanosoma cruzi (T. cruzi) spliced-leader intergenic region of the mini-exon gene intergenic region (SL-IR) fragment was performed on intestinal tissue and fecal content DNA extracted from 19 Meccus pallidipennis (M. pallidipennis) specimens collected in the southern region of the State of Mexico. DNA sequence analysis from 49 bp T. cruzi SL-IR showed that all 19 samples corresponded to haplotype TcIa, and all of them were identical to GenBank sequence JQ028863. When extending the analysis to the whole 256 bp amplified sequence of the SL-IR, we found six sequences with a C insertion at position 10, one of which also presented a mutation (T/C) at position 54. One more sequence had an insertion (T) at position 223. Our findings suggest that two dominating TcIa clones are present in M. pallidipennis in the southern region of the State of Mexico. Interestingly, the SL-IR region of the dominating genotype was 100% identical to a circulating clone from Costa Rica present in humans, dogs, Triatoma dimidiata, and Panstrongylus rufotuberculatus. Future regional studies should explore the presence of this haplotype in humans and domestic animals.
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Affiliation(s)
- Fátima Ingrid López-Vivas
- 1 Facultad de Medicina Veterinaria y Zootecnia, Centro de Investigación y Estudios Avanzados en Salud Animal, Universidad Autónoma del Estado de México (UAEM) , Toluca, México
| | - Juan Carlos Vázquez-Chagoyán
- 1 Facultad de Medicina Veterinaria y Zootecnia, Centro de Investigación y Estudios Avanzados en Salud Animal, Universidad Autónoma del Estado de México (UAEM) , Toluca, México
| | - Jorge Pablo Acosta-Dibarrat
- 1 Facultad de Medicina Veterinaria y Zootecnia, Centro de Investigación y Estudios Avanzados en Salud Animal, Universidad Autónoma del Estado de México (UAEM) , Toluca, México
| | - Imelda Medina-Torres
- 1 Facultad de Medicina Veterinaria y Zootecnia, Centro de Investigación y Estudios Avanzados en Salud Animal, Universidad Autónoma del Estado de México (UAEM) , Toluca, México
| | - Héctor M Diaz-Albiter
- 2 Wellcome Centre for Molecular Parasitology, Institute of Infection, Immunity and Inflammation, College of Medical, Veterinary and Life Sciences, University of Glasgow , Glasgow, United Kingdom
| | - Pomposo Fernández-Rosas
- 1 Facultad de Medicina Veterinaria y Zootecnia, Centro de Investigación y Estudios Avanzados en Salud Animal, Universidad Autónoma del Estado de México (UAEM) , Toluca, México
| | - Roberto Montes de Oca-Jiménez
- 1 Facultad de Medicina Veterinaria y Zootecnia, Centro de Investigación y Estudios Avanzados en Salud Animal, Universidad Autónoma del Estado de México (UAEM) , Toluca, México
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23
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Detailed ecological associations of triatomines revealed by metabarcoding and next-generation sequencing: implications for triatomine behavior and Trypanosoma cruzi transmission cycles. Sci Rep 2018. [PMID: 29515202 PMCID: PMC5841364 DOI: 10.1038/s41598-018-22455-x] [Citation(s) in RCA: 84] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
Trypanosoma cruzi is the agent of Chagas disease, transmitted by hematophagous triatomine vectors. Establishing transmission cycles is key to understand the epidemiology of the disease, but integrative assessments of ecological interactions shaping parasite transmission are still limited. Current approaches also lack sensitivity to assess the full extent of this ecological diversity. Here we developed a metabarcoding approach based on next-generation sequencing to identify triatomine gut microbiome, vertebrate feeding hosts, and parasite diversity and their potential interactions. We detected a dynamic microbiome in Triatoma dimidiata, including 23 bacterial orders, which differed according to blood sources. Fourteen vertebrate species served as blood sources, corresponding to domestic, synantropic and sylvatic species, although four (human, dog, cow and mice) accounted for over 50% of blood sources. Importantly, bugs fed on multiple hosts, with up to 11 hosts identified per bug, indicating very frequent host-switching. A high clonal diversity of T. cruzi was detected, with up to 20 haplotypes per bug. This analysis provided much greater sensitivity to detect multiple blood meals and multiclonal infections with T. cruzi, which should be taken into account to develop transmission networks, and characterize the risk for human infection, eventually leading to a better control of disease transmission.
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24
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Buekens P, Cafferata ML, Alger J, Althabe F, Belizán JM, Bustamante N, Carlier Y, Ciganda A, Del Cid JH, Dumonteil E, Gamboa-León R, García JA, Gibbons L, Graiff O, Maldonado JG, Herrera C, Howard E, Lara LS, López B, Matute ML, Ramírez-Sierra MJ, Robles MC, Sosa-Estani S, Truyens C, Valladares C, Wesson DM, Zúniga C, For The Congenital Chagas Working Group. Congenital Transmission of Trypanosoma cruzi in Argentina, Honduras, and Mexico: An Observational Prospective Study. Am J Trop Med Hyg 2017; 98:478-485. [PMID: 29210352 DOI: 10.4269/ajtmh.17-0516] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
Compared with South America, there is a lack of epidemiologic studies about the risk of congenital transmission of Trypanosoma cruzi in Central America and Mexico. It has been suggested that T. cruzi genotypes might differ by region and that congenital transmission might vary according to the parasite's genotype. Our objective was to compare T. cruzi congenital transmission rates in three countries. We performed an observational prospective study in 2011-2014 enrolling women at delivery in one hospital in Argentina, two hospitals in Honduras, and two hospitals in Mexico. Congenital T. cruzi infection was defined as the presence of one or more of the following criteria: presence of parasites in cord blood (direct parasitological microscopic examination) with positive polymerase chain reaction (PCR) in cord blood, presence of parasites in infant's blood at 4-8 weeks (direct parasitological microscopic examination), and persistence of T. cruzi-specific antibodies at 10 months, as measured by at least two tests. Among 28,145 enrolled women, 347 had at least one antibody rapid test positive in cord blood and a positive enzyme-linked immunosorbent assay in maternal blood. PCR in maternal blood was positive in 73.2% of the cases, and genotyping identified a majority of non-TcI in the three countries. We found no (0.0%; 95% confidence interval [CI]: 0.0, 2.0) confirmed congenital case in Honduras. Congenital transmission was 6.6% (95% CI: 3.1, 12.2) in Argentina and 6.3% (95% CI: 0.8, 20.8) in Mexico. Trypanosoma cruzi non-TcI predominated and risks of congenital transmission were similar in Argentina and Mexico.
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Affiliation(s)
- Pierre Buekens
- Tulane University School of Public Health and Tropical Medicine, New Orleans, Louisiana
| | - María Luisa Cafferata
- Unidad de Investigación Clínica y Epidemiológica Montevideo (UNICEM), Montevideo, Uruguay
| | - Jackeline Alger
- Hospital Escuela Universitario, Facultad de Ciencias Médicas, UNAH, Tegucigalpa, Honduras
| | - Fernando Althabe
- Instituto de Efectividad Clínica y Sanitaria (IECS), Buenos Aires, Argentina
| | - José M Belizán
- Instituto de Efectividad Clínica y Sanitaria (IECS), Buenos Aires, Argentina
| | | | - Yves Carlier
- Laboratory of Parasitology, Faculty of Medicine, Université Libre de Bruxelles (ULB), Brussels, Belgium.,Tulane University School of Public Health and Tropical Medicine, New Orleans, Louisiana
| | - Alvaro Ciganda
- Unidad de Investigación Clínica y Epidemiológica Montevideo (UNICEM), Montevideo, Uruguay
| | | | - Eric Dumonteil
- Tulane University School of Public Health and Tropical Medicine, New Orleans, Louisiana
| | | | - Jorge A García
- Hospital Escuela Universitario, Facultad de Ciencias Médicas, UNAH, Tegucigalpa, Honduras
| | - Luz Gibbons
- Instituto de Efectividad Clínica y Sanitaria (IECS), Buenos Aires, Argentina
| | - Olga Graiff
- Instituto de Maternidad y Ginecología Nuestra Señora de las Mercedes, San Miguel de Tucumán, Argentina
| | - Jesús Gurubel Maldonado
- Centro de Investigaciones Regionales "Dr. Hideyo Noguchi," Universidad Autónoma de Yucatán, Mérida, México
| | - Claudia Herrera
- Tulane University School of Public Health and Tropical Medicine, New Orleans, Louisiana
| | - Elizabeth Howard
- Tulane University School of Public Health and Tropical Medicine, New Orleans, Louisiana
| | - Laura Susana Lara
- Instituto de Maternidad y Ginecología Nuestra Señora de las Mercedes, San Miguel de Tucumán, Argentina
| | | | - María Luisa Matute
- Laboratorio Nacional de Vigilancia de la Salud, Secretaría de Salud de Honduras, Tegucigalpa, Honduras
| | - María Jesús Ramírez-Sierra
- Centro de Investigaciones Regionales "Dr. Hideyo Noguchi," Universidad Autónoma de Yucatán, Mérida, México
| | - María Cecilia Robles
- Instituto de Maternidad y Ginecología Nuestra Señora de las Mercedes, San Miguel de Tucumán, Argentina
| | - Sergio Sosa-Estani
- Instituto Nacional de Parasitología "Dr. Mario Fatala Chaben," CONICET, ANLIS, Buenos Aires, Argentina.,Instituto de Efectividad Clínica y Sanitaria (IECS), Buenos Aires, Argentina
| | - Carine Truyens
- Laboratory of Parasitology, Faculty of Medicine, Université Libre de Bruxelles (ULB), Brussels, Belgium
| | - Christian Valladares
- Laboratorio Nacional de Vigilancia de la Salud, Secretaría de Salud de Honduras, Tegucigalpa, Honduras
| | - Dawn M Wesson
- Tulane University School of Public Health and Tropical Medicine, New Orleans, Louisiana
| | - Concepción Zúniga
- Hospital Escuela Universitario, Facultad de Ciencias Médicas, UNAH, Tegucigalpa, Honduras
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25
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Dorn PL, McClure AG, Gallaspy MD, Waleckx E, Woods AS, Monroy MC, Stevens L. The diversity of the Chagas parasite, Trypanosoma cruzi, infecting the main Central American vector, Triatoma dimidiata, from Mexico to Colombia. PLoS Negl Trop Dis 2017; 11:e0005878. [PMID: 28957315 PMCID: PMC5619707 DOI: 10.1371/journal.pntd.0005878] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2017] [Accepted: 08/17/2017] [Indexed: 01/02/2023] Open
Abstract
Little is known about the strains of Trypanosoma cruzi circulating in Central America and specifically in the most important vector in this region, Triatoma dimidiata. Approximately six million people are infected with T. cruzi, the causative agent of Chagas disease, which has the greatest negative economic impact and is responsible for ~12,000 deaths annually in Latin America. By international consensus, strains of T. cruzi are divided into six monophyletic clades called discrete typing units (DTUs TcI-VI) and a seventh DTU first identified in bats called TcBat. TcI shows the greatest geographic range and diversity. Identifying strains present and diversity within these strains is important as different strains and their genotypes may cause different pathologies and may circulate in different localities and transmission cycles, thus impacting control efforts, treatment and vaccine development. To determine parasite strains present in T. dimidiata across its geographic range from Mexico to Colombia, we isolated abdominal DNA from T. dimidiata and determined which specimens were infected with T. cruzi by PCR. Strains from infected insects were determined by comparing the sequence of the 18S rDNA and the spliced-leader intergenic region to typed strains in GenBank. Two DTUs were found: 94% of infected T. dimidiata contained TcI and 6% contained TcIV. TcI exhibited high genetic diversity. Geographic structure of TcI haplotypes was evident by Principal Component and Median-Joining Network analyses as well as a significant result in the Mantel test, indicating isolation by distance. There was little evidence of association with TcI haplotypes and host/vector or ecotope. This study provides new information about the strains circulating in the most important Chagas vector in Central America and reveals considerable variability within TcI as well as geographic structuring at this large geographic scale. The lack of association with particular vectors/hosts or ecotopes suggests the parasites are moving among vectors/hosts and ecotopes therefore a comprehensive approach, such as the Ecohealth approach that makes houses refractory to the vectors will be needed to successfully halt transmission of Chagas disease.
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Affiliation(s)
- Patricia L. Dorn
- Loyola University New Orleans, New Orleans, Louisiana, United States of America
| | - Annie G. McClure
- Loyola University New Orleans, New Orleans, Louisiana, United States of America
| | - Meghan D. Gallaspy
- Loyola University New Orleans, New Orleans, Louisiana, United States of America
| | | | - Adrienne S. Woods
- Loyola University New Orleans, New Orleans, Louisiana, United States of America
| | | | - Lori Stevens
- University of Vermont, Burlington, Vermont, United States of America
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26
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Dario MA, Rodrigues MS, Barros JHDS, Xavier SCDC, D’Andrea PS, Roque ALR, Jansen AM. Ecological scenario and Trypanosoma cruzi DTU characterization of a fatal acute Chagas disease case transmitted orally (Espírito Santo state, Brazil). Parasit Vectors 2016; 9:477. [PMID: 27580853 PMCID: PMC5006519 DOI: 10.1186/s13071-016-1754-4] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2016] [Accepted: 08/12/2016] [Indexed: 01/30/2023] Open
Abstract
BACKGROUND Trypanosoma cruzi infection via oral route results in outbreaks or cases of acute Chagas disease (ACD) in different Brazilian regions and poses a novel epidemiological scenario. In the Espírito Santo state (southeastern Brazil), a fatal case of a patient with ACD led us to investigate the enzootic scenario to avoid the development of new cases. At the studied locality, Triatoma vitticeps exhibited high T. cruzi infection rates and frequently invaded residences. METHODS Sylvatic and domestic mammals in the Rio da Prata locality, where the ACD case occurred, and in four surrounding areas (Baia Nova, Buenos Aires, Santa Rita and Todos os Santos) were examined and underwent parasitological and serological tests. Triatomines were collected for a fecal material exam, culturing and mini-exon gene molecular characterization, followed by RFLP-PCR of H3/Alul. Paraffin-embedded cardiac tissue of a patient was washed with xylene to remove paraffin and DNA was extracted using the phenol-chloroform method. For genotype characterization, PCR was performed to amplify the 1f8, GPI and 18S rRNA genes. In the case of V7V8 SSU rRNA, the PCR products were molecularly cloned. PCR products were sequenced and compared to sequences in GenBank. Phylogenetic analysis using maximum likelihood method with 1000 bootstrap replicates was performed. RESULTS None of the animals showed positive hemocultures. Three rodents and two dogs showed signs of infection, as inferred from borderline serological titers. T. vitticeps was the only triatomine species identified and showed T. cruzi infection by DTUs TcI and TcIV. The analysis of cardiac tissue DNA showed mixed infection by T. cruzi (DTUs I, II, III and IV) and Trypanosoma dionisii. CONCLUSIONS Each case or outbreak of ACD should be analyzed as a particular epidemiological occurrence. The results indicated that mixed infections in humans may play a role in pathogenicity and may be more common than is currently recognized. Direct molecular characterization from biological samples is essential because this procedure avoids parasite selection. T. dionisii may under certain and unknown circumstances infect humans. The distribution of T. cruzi DTUS TcIII and TcIV in Brazilian biomes is broader than has been assumed to date.
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Affiliation(s)
- Maria Augusta Dario
- Laboratory of Trypanosomatid Biology, Oswaldo Cruz Institute, Fiocruz, Rio de Janeiro, Rio de Janeiro Brazil
| | - Marina Silva Rodrigues
- Laboratory of Trypanosomatid Biology, Oswaldo Cruz Institute, Fiocruz, Rio de Janeiro, Rio de Janeiro Brazil
| | | | | | - Paulo Sérgio D’Andrea
- Laboratory of Biology and Parasitology of Wild Reservoir Mammals, Oswaldo Cruz Institute, Fiocruz, Rio de Janeiro, Rio de Janeiro Brazil
| | - André Luiz Rodrigues Roque
- Laboratory of Trypanosomatid Biology, Oswaldo Cruz Institute, Fiocruz, Rio de Janeiro, Rio de Janeiro Brazil
| | - Ana Maria Jansen
- Laboratory of Trypanosomatid Biology, Oswaldo Cruz Institute, Fiocruz, Rio de Janeiro, Rio de Janeiro Brazil
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Brenière SF, Waleckx E, Barnabé C. Over Six Thousand Trypanosoma cruzi Strains Classified into Discrete Typing Units (DTUs): Attempt at an Inventory. PLoS Negl Trop Dis 2016; 10:e0004792. [PMID: 27571035 PMCID: PMC5003387 DOI: 10.1371/journal.pntd.0004792] [Citation(s) in RCA: 145] [Impact Index Per Article: 18.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2016] [Accepted: 05/31/2016] [Indexed: 01/06/2023] Open
Abstract
Trypanosoma cruzi, the causative agent of Chagas disease, presents wide genetic diversity. Currently, six discrete typing units (DTUs), named TcI to TcVI, and a seventh one called TcBat are used for strain typing. Beyond the debate concerning this classification, this systematic review has attempted to provide an inventory by compiling the results of 137 articles that have used it. A total of 6,343 DTU identifications were analyzed according to the geographical and host origins. Ninety-one percent of the data available is linked to South America. This sample, although not free of potential bias, nevertheless provides today's picture of T. cruzi genetic diversity that is closest to reality. DTUs were genotyped from 158 species, including 42 vector species. Remarkably, TcI predominated in the overall sample (around 60%), in both sylvatic and domestic cycles. This DTU known to present a high genetic diversity, is very widely distributed geographically, compatible with a long-term evolution. The marsupial is thought to be its most ancestral host and the Gran Chaco region the place of its putative origin. TcII was rarely sampled (9.6%), absent, or extremely rare in North and Central America, and more frequently identified in domestic cycles than in sylvatic cycles. It has a low genetic diversity and has probably found refuge in some mammal species. It is thought to originate in the south-Amazon area. TcIII and TcIV were also rarely sampled. They showed substantial genetic diversity and are thought to be composed of possible polyphyletic subgroups. Even if they are mostly associated with sylvatic transmission cycles, a total of 150 human infections with these DTUs have been reported. TcV and TcVI are clearly associated with domestic transmission cycles. Less than 10% of these DTUs were identified together in sylvatic hosts. They are thought to originate in the Gran Chaco region, where they are predominant and where putative parents exist (TcII and TcIII). Trends in host-DTU specificities exist, but generally it seems that the complexity of the cycles and the participation of numerous vectors and mammal hosts in a shared area, maintains DTU diversity.
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Affiliation(s)
- Simone Frédérique Brenière
- IRD-CIRAD, INTERTRYP (Interactions hôtes-vecteurs-parasites-environnement dans les maladies tropicales négligées dues aux Trypanosomatidés), IRD Center, Montpellier, France
- Pontificia Universidad Católica del Ecuador, Centro de Investigación para la Salud en América Latina (CISeAL), Quito, Ecuador
- * E-mail:
| | - Etienne Waleckx
- Centro de Investigaciones Regionales “Hideyo Noguchi”, Universidad Autónoma de Yucatán, Mérida, Yucatán, México
| | - Christian Barnabé
- IRD-CIRAD, INTERTRYP (Interactions hôtes-vecteurs-parasites-environnement dans les maladies tropicales négligées dues aux Trypanosomatidés), IRD Center, Montpellier, France
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Wong YY, Sornosa Macias KJ, Guale Martínez D, Solorzano LF, Ramirez-Sierra MJ, Herrera C, Dumonteil E. Molecular epidemiology of Trypanosoma cruzi and Triatoma dimidiata in costal Ecuador. INFECTION GENETICS AND EVOLUTION 2016; 41:207-212. [PMID: 27079265 DOI: 10.1016/j.meegid.2016.04.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2016] [Revised: 04/01/2016] [Accepted: 04/03/2016] [Indexed: 11/17/2022]
Abstract
Chagas disease is a neglected tropical disease caused by the protozoan parasite Trypanosoma cruzi. In Ecuador, Triatoma dimidiata and Rhodnius ecuadoriensis are the main vector species, responsible for over half of the cases of T. cruzi infection in the country. T. dimidiata is believed to have been introduced in Ecuador during colonial times, and its elimination from the country is thus believed to be feasible. We investigated here the molecular ecology of T. dimidiata and T. cruzi in costal Ecuador to further guide control efforts. Analysis of the Internal Transcribed Spacer 2 (ITS-2) of 23 specimens from Progreso, Guayas, unambiguously supported the likely importation of T. dimidiata from Central America to Ecuador. The observation of a very high parasite infection rate (54%) and frequent feeding on humans (3/5) confirmed a continued risk of transmission to humans. All genotyped parasites corresponded to TcI DTU and Trypanosoma rangeli was not detected in T. dimidiata. TcI subgroups corresponded to TcIa (25%), and mixed infections with TcIa and TcId (75%). Further studies should help clarify T. cruzi genetic structure in the country, and the possible impact of the introduction of T. dimidiata on the circulating parasite strains. The elevated risk posed by this species warrants continuing efforts for its control, but its apparent mobility between peridomestic and domestic habitats may favor reinfestation following insecticide spraying.
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Affiliation(s)
- Yim Yan Wong
- Centro de Referencia Nacional de Parasitología, Instituto Nacional de Investigación en Salud Pública Leopoldo Izquieta Perez (INSPI), Guayaquil, Ecuador
| | - Karen Jeniffer Sornosa Macias
- Centro de Referencia Nacional de Parasitología, Instituto Nacional de Investigación en Salud Pública Leopoldo Izquieta Perez (INSPI), Guayaquil, Ecuador
| | - Doris Guale Martínez
- Centro de Referencia Nacional de Parasitología, Instituto Nacional de Investigación en Salud Pública Leopoldo Izquieta Perez (INSPI), Guayaquil, Ecuador
| | - Luis F Solorzano
- Centro de Referencia Nacional de Parasitología, Instituto Nacional de Investigación en Salud Pública Leopoldo Izquieta Perez (INSPI), Guayaquil, Ecuador
| | - Maria Jesus Ramirez-Sierra
- Laboratorio de Parasitología, Centro de Investigaciones Regionales "Hideyo Noguchi", Universidad Autónoma de Yucatán, Merida, Yucatan, Mexico
| | - Claudia Herrera
- Department of Tropical Medicine, Vector-Borne Infection Disease Research Center, School of Public Health and Tropical Medicine, Tulane University, New Orleans, LA, USA
| | - Eric Dumonteil
- Centro de Referencia Nacional de Parasitología, Instituto Nacional de Investigación en Salud Pública Leopoldo Izquieta Perez (INSPI), Guayaquil, Ecuador; Laboratorio de Parasitología, Centro de Investigaciones Regionales "Hideyo Noguchi", Universidad Autónoma de Yucatán, Merida, Yucatan, Mexico; Department of Tropical Medicine, Vector-Borne Infection Disease Research Center, School of Public Health and Tropical Medicine, Tulane University, New Orleans, LA, USA.
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Guzmán-Gómez D, López-Monteon A, de la Soledad Lagunes-Castro M, Álvarez-Martínez C, Hernández-Lutzon MJ, Dumonteil E, Ramos-Ligonio A. Highly discordant serology against Trypanosoma cruzi in central Veracruz, Mexico: role of the antigen used for diagnostic. Parasit Vectors 2015; 8:466. [PMID: 26384317 PMCID: PMC4573690 DOI: 10.1186/s13071-015-1072-2] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2015] [Accepted: 09/04/2015] [Indexed: 12/20/2022] Open
Abstract
Background Chagas disease is a parasitic disease caused by the protozoan parasite Trypanosoma cruzi. In Mexico, the burden of the disease is difficult to estimate and improving surveillance for Chagas disease is an important priority. We aimed here at determining the seroprevalence of T. cruzi infection in humans in a rural community in Veracruz. Methods Serum samples (196) were analyzed for T. cruzi infection using five enzyme-linked immunosorbent assay (ELISA) tests: two in-house tests based on crude parasite extract and three commercial ELISA kits. Because of highly discordant results, we further explored the importance of parasite antigens and strains by western-blot analysis. Results A total of 74 samples (37.7 %) were reactive with at least one ELISA, but discordance among tests was very high. The best agreement was between Chagatest recombinant and Chagatek ELISA (Kappa index = 0.798). The agreement between other combinations of tests ranged from 0.038 to 0.518. Discordant samples were confirmed by western-blot analysis using up to nine parasite strains, giving a seroprevalence of 33.7 %. Conclusions Commercial tests had a very limited ability to detect T. cruzi infection in the study population. In-house tests based on crude parasite antigens showed a greater sensitivity but were still unable to detect all cases of T. cruzi infection, even when based on a local parasite strain. The high seroprevalence confirmed the hyper-endemicity of T. cruzi infection in the region. Reliable epidemiological surveillance of Chagas disease will require the development of improved diagnostic tests. Electronic supplementary material The online version of this article (doi:10.1186/s13071-015-1072-2) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Daniel Guzmán-Gómez
- Doctorado en Ciencias Biomédicas, Universidad Veracruzana, Xalapa, Veracruz, Mexico. .,LADISER Inmunología y Biología Molecular, Facultad de Ciencias Químicas, Universidad Veracruzana, Orizaba, Veracruz, Mexico.
| | - Aracely López-Monteon
- LADISER Inmunología y Biología Molecular, Facultad de Ciencias Químicas, Universidad Veracruzana, Orizaba, Veracruz, Mexico. .,Centro de Investigaciones Biomédicas, Universidad Veracruzana, Xalapa, Veracruz, Mexico.
| | - María de la Soledad Lagunes-Castro
- Doctorado en Ciencias Biomédicas, Universidad Veracruzana, Xalapa, Veracruz, Mexico. .,LADISER Inmunología y Biología Molecular, Facultad de Ciencias Químicas, Universidad Veracruzana, Orizaba, Veracruz, Mexico.
| | - Carolina Álvarez-Martínez
- LADISER Inmunología y Biología Molecular, Facultad de Ciencias Químicas, Universidad Veracruzana, Orizaba, Veracruz, Mexico.
| | - Manuel Jesús Hernández-Lutzon
- LADISER Inmunología y Biología Molecular, Facultad de Ciencias Químicas, Universidad Veracruzana, Orizaba, Veracruz, Mexico.
| | - Eric Dumonteil
- Laboratorio de Parasitología, Centro de Investigaciones Regionales "Dr. Hideyo Noguchi", Universidad Autónoma de Yucatán, Mérida, Yucatán, Mexico. .,Department of Tropical Medicine, Tulane University, School of Public Health and Tropical Medicine, New Orleans, LA, USA.
| | - Angel Ramos-Ligonio
- LADISER Inmunología y Biología Molecular, Facultad de Ciencias Químicas, Universidad Veracruzana, Orizaba, Veracruz, Mexico. .,Centro de Investigaciones Biomédicas, Universidad Veracruzana, Xalapa, Veracruz, Mexico.
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Messenger LA, Miles MA, Bern C. Between a bug and a hard place: Trypanosoma cruzi genetic diversity and the clinical outcomes of Chagas disease. Expert Rev Anti Infect Ther 2015; 13:995-1029. [PMID: 26162928 PMCID: PMC4784490 DOI: 10.1586/14787210.2015.1056158] [Citation(s) in RCA: 134] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Over the last 30 years, concomitant with successful transnational disease control programs across Latin America, Chagas disease has expanded from a neglected, endemic parasitic infection of the rural poor to an urbanized chronic disease, and now a potentially emergent global health problem. Trypanosoma cruzi infection has a highly variable clinical course, ranging from complete absence of symptoms to severe and often fatal cardiovascular and/or gastrointestinal manifestations. To date, few correlates of clinical disease progression have been identified. Elucidating a putative role for T. cruzi strain diversity in Chagas disease pathogenesis is complicated by the scarcity of parasites in clinical specimens and the limitations of our contemporary genotyping techniques. This article systematically reviews the historical literature, given our current understanding of parasite genetic diversity, to evaluate the evidence for any association between T. cruzi genotype and chronic clinical outcome, risk of congenital transmission or reactivation and orally transmitted outbreaks.
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Affiliation(s)
- Louisa A Messenger
- Department of Pathogen Molecular Biology, Faculty of Infectious Tropical Diseases, London School of Hygiene and Tropical Medicine, London, UK
| | - Michael A Miles
- Department of Pathogen Molecular Biology, Faculty of Infectious Tropical Diseases, London School of Hygiene and Tropical Medicine, London, UK
| | - Caryn Bern
- Global Health Sciences, Department of Epidemiology and Biostatistics, School of Medicine, University of California San Francisco, San Francisco, CA, USA
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Herrera CP, Licon MH, Nation CS, Jameson SB, Wesson DM. Genotype diversity of Trypanosoma cruzi in small rodents and Triatoma sanguisuga from a rural area in New Orleans, Louisiana. Parasit Vectors 2015; 8:123. [PMID: 25890064 PMCID: PMC4344744 DOI: 10.1186/s13071-015-0730-8] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2014] [Accepted: 02/12/2015] [Indexed: 12/18/2022] Open
Abstract
Background Chagas disease is an anthropozoonosis caused by the protozoan parasite Trypanosoma cruzi that represents a major public health problem in Latin America. Although the United States is defined as non-endemic for Chagas disease due to the rarity of human cases, the presence of T. cruzi has now been amply demonstrated as enzootic in different regions of the south of the country from Georgia to California. In southeastern Louisiana, a high T. cruzi infection rate has been demonstrated in Triatoma sanguisuga, the local vector in this area. However, little is known about the role of small mammals in the wild and peridomestic transmission cycles. Methods This study focused on the molecular identification and genotyping of T. cruzi in both small rodents and T. sanguisuga from a rural area of New Orleans, Louisiana. DNA extractions were prepared from rodent heart, liver, spleen and skeletal muscle tissues and from cultures established from vector feces. T. cruzi infection was determined by standard PCR using primers specific for the minicircle variable region of the kinetoplastid DNA (kDNA) and the highly repetitive genomic satellite DNA (satDNA). Genotyping of discrete typing units (DTUs) was performed by amplification of mini-exon and 18S and 24Sα rRNA genes and subsequent sequence analysis. Results The DTUs TcI, TcIV and, for the first time, TcII, were identified in tissues of mice and rats naturally infected with T. cruzi captured in an area of New Orleans, close to the house where the first human case of Chagas disease was reported in Louisiana. The T. cruzi infection rate in 59 captured rodents was 76%. The frequencies of the detected DTUs in such mammals were TcI 82%, TcII 22% and TcIV 9%; 13% of all infections contained more than one DTU. Conclusions Our results indicate a probable presence of a considerably greater diversity in T. cruzi DTUs circulating in the southeastern United States than previously reported. Understanding T. cruzi transmission dynamics in sylvatic and peridomestic cycles in mammals and insect vectors will be crucial to estimating the risk of local, vector-borne transmission of T. cruzi to humans in the United States.
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Affiliation(s)
- Claudia P Herrera
- Department of Tropical Medicine, Vector-Borne Infectious Disease Research Center, School of Public Health and Tropical Medicine, Tulane University, 1440 Canal Street, Rm. 1824, New Orleans, LA, 70112, USA.
| | - Meredith H Licon
- Department of Tropical Medicine, Vector-Borne Infectious Disease Research Center, School of Public Health and Tropical Medicine, Tulane University, 1440 Canal Street, Rm. 1824, New Orleans, LA, 70112, USA.
| | - Catherine S Nation
- Department of Tropical Medicine, Vector-Borne Infectious Disease Research Center, School of Public Health and Tropical Medicine, Tulane University, 1440 Canal Street, Rm. 1824, New Orleans, LA, 70112, USA.
| | - Samuel B Jameson
- Department of Tropical Medicine, Vector-Borne Infectious Disease Research Center, School of Public Health and Tropical Medicine, Tulane University, 1440 Canal Street, Rm. 1824, New Orleans, LA, 70112, USA.
| | - Dawn M Wesson
- Department of Tropical Medicine, Vector-Borne Infectious Disease Research Center, School of Public Health and Tropical Medicine, Tulane University, 1440 Canal Street, Rm. 1824, New Orleans, LA, 70112, USA.
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Monteón V, Triana-Chávez O, Mejía-Jaramillo A, Pennignton P, Ramos-Ligonio Á, Acosta K, Lopez R. Circulation of Tc Ia discrete type unit Trypanosoma cruzi in Yucatan Mexico. J Parasit Dis 2014; 40:550-4. [PMID: 27413339 DOI: 10.1007/s12639-014-0499-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2013] [Accepted: 06/24/2014] [Indexed: 01/04/2023] Open
Abstract
The etiologic agent Trypanosoma cruzi (Tc) has been grouped into six discrete type units (DTU I-VI); within DTU-I exists four subgroups defined Ia-Id. In Colombia, the genotype Ia is associated with human infection and domiciliated Rhodnius vector. In the Yucatan Peninsula of Mexico, the main vector involved in T. cruzi transmission is Triatoma dimidiata predominantly via sylvatic and peridomiciliated cycles. In this study, multiple sequence analysis of mini-exon intergenic regions of T. cruzi isolates obtained from T. dimidiata in the Yucatan Peninsula of Mexico revealed they belonged to Tc Ia DTU along with two additional Mexican strains located 1,570 km away from Yucatan. In conclusion Tc Ia circulates in the Yucatan peninsula in T. dimidiata vector and likewise in the northwest region of Mexico.
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Affiliation(s)
- Victor Monteón
- Centro de Investigaciones Biomédicas, Universidad Autónoma de Campeche, Campus de la Salud, Col Linda Vista Campeche, 24090 Campeche, Mexico
| | - Omar Triana-Chávez
- Grupo Biología y Control de Enfermedades Infecciosas (BCEI), Universidad de Antioquia, Medellín, Colombia
| | - Ana Mejía-Jaramillo
- Grupo Biología y Control de Enfermedades Infecciosas (BCEI), Universidad de Antioquia, Medellín, Colombia
| | - Pamela Pennignton
- Center for Health Studies, Universidad del Valle de Guatemala, Guatemala City, Guatemala
| | - Ángel Ramos-Ligonio
- Laboratorio de Investigación y Servicios (LADASIER) Inmunología y Biología Molecular, Universidad Veracruzana, Orizaba, Veracruz Mexico
| | - Karla Acosta
- Centro Regional de Investigaciones Biomédicas "Hideyo Noguchi", Mérida, Yucatán Mexico
| | - Ruth Lopez
- Centro de Investigaciones Biomédicas, Universidad Autónoma de Campeche, Campus de la Salud, Col Linda Vista Campeche, 24090 Campeche, Mexico
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Microsatellite loci-based distribution of Trypanosoma cruzi genotypes from Chilean chronic Chagas disease patients and Triatoma infestans is concordant with a specific host-parasite association hypothesis. Acta Parasitol 2013; 58:139-48. [PMID: 23666648 DOI: 10.2478/s11686-013-0123-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/29/2012] [Indexed: 11/20/2022]
Abstract
The objective of this study was to investigate if there is specific host-parasite association in Chilean populations of Trypanosoma cruzi. For this purpose, two groups of parasites were analyzed, one from chronic chagasic patients, and the other from Triatoma infestans triatomines in three regions of the country. The first group consisted of four types of samples: parasites from peripheral blood of non-cardiopathic T. cruzi infected patients (NB); parasites from their corresponding xenodiagnosis (NX); parasites from peripheral blood of T. cruzi infected cardiopathic patients (CB) and parasites from their xenodiagnostics (CX). The T. infestans sample in turn was from three regions: III, V and M (Metropolitan). The genetic differentiation by the Fisher exact method, the lineage distribution of the samples, the molecular phylogeny and the frequency of multiclonality were analysed. The results show that not only are the groups of T. cruzi clones from Chagas disease patients and vectors genetically differentiated, but also all the sub-groups (NB, NX, CB and CX) from the III, V and M regions. The analysis of lineage distribution was concordant with the above results, because significant differences among the percentages of TcI, TcIII and hybrids (TcV or TcVI) were observed. The phylogenetic reconstruction with these Chilean T. cruzi samples was coherent with the above results because the four chagasic samples clustered together in a node with high bootstrap support, whereas the three triatomine samples (III, V and M) were located apart from that node. The topology of the tree including published T. cruzi clones and isolates was concordant with the known topology, which confirmed that the results presented here are correct and are not biased by experimental error. Taken together the results presented here are concordant with a specific host-parasite association between some Chilean T. cruzi populations.
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Quijano-Hernández IA, Castro-Barcena A, Vázquez-Chagoyán JC, Bolio-González ME, Ortega-López J, Dumonteil E. Preventive and therapeutic DNA vaccination partially protect dogs against an infectious challenge with Trypanosoma cruzi. Vaccine 2013; 31:2246-52. [DOI: 10.1016/j.vaccine.2013.03.005] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2012] [Revised: 02/06/2013] [Accepted: 03/04/2013] [Indexed: 10/27/2022]
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Trypanosoma cruzi I and IV stocks from Brazilian Amazon are divergent in terms of biological and medical properties in mice. PLoS Negl Trop Dis 2013; 7:e2069. [PMID: 23437410 PMCID: PMC3578774 DOI: 10.1371/journal.pntd.0002069] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2012] [Accepted: 01/07/2013] [Indexed: 12/03/2022] Open
Abstract
Background In the Brazilian Amazon, clinical and epidemiological frameworks of Chagas disease are very dissimilar in relation to the endemic classical areas of transmission, possibly due to genetic and biological characteristics of the circulating Trypanosoma cruzi stocks. Twenty six T. cruzi stocks from Western Amazon Region attributed to the TcI and TcIV DTUs were comparatively studied in Swiss mice to test the hypothesis that T. cruzi clonal structure has a major impact on its biological and medical properties. Methodology/Principal Findings Seventeen parameters were assayed in mice infected with 14 T. cruzi strains belonging to DTU TcI and 11 strains typed as TcIV. In comparison with TcI, TcIV stocks promoted a significantly shorter pre-patent period (p<0.001), a longer patent period (p<0.001), higher values of mean daily parasitemia (p = 0.009) and maximum of parasitemia (p = 0.015), earlier days of maximum parasitemia (p<0.001) and mortality (p = 0.018), higher mortality rates in the acute phase (p = 0.047), higher infectivity rates (p = 0.002), higher positivity in the fresh blood examination (p<0.001), higher positivity in the ELISA at the early chronic phase (p = 0.022), and a higher positivity in the ELISA at the late chronic phase (p = 0.003). On the other hand TcI showed higher values of mortality rates in the early chronic phase (p = 0.014), higher frequency of mice with inflammatory process in any organ (p = 0.005), higher frequency of mice with tissue parasitism in any organ (p = 0.027) and a higher susceptibility to benznidazole (p = 0.002) than TcIV. Survival analysis showing the time elapsed from the day of inoculation to the beginning of the patent period was significantly shorter for TcIV strains and the death episodes triggered following the infection with TcI occurred significantly later in relation to TcIV. The notable exceptions come from positivity in the hemocultures and PCR, for which the results were similar. Conclusion/Significance T. cruzi stocks belonging to TcI and TcIV DTUs from Brazilian Amazon are divergent in terms of biological and medical properties in mice. Chagas disease is caused by the protozoan parasite Trypanosoma cruzi, constituting an important health problem in the American Continent. In the Brazilian Amazon, Chagas disease has been recognized as an emerging problem. There are few studies exploring the genetic and biological framework of stocks of T. cruzi from the Western Brazilian Amazon, where Chagas disease has a profile of lower morbidity and mortality, appearing mainly in the chronic latent form. Here, we carried out the biological characterization in mice of T. cruzi isolates belonging to TcI and TcIV DTUs from the State of Amazonas, Western Brazilian Amazon. T. cruzi stocks belonging to TcI and TcIV DTUs from Brazilian Amazon are divergent in terms of biological and medical properties in mice, with a higher virulence for the latter DTU as revealed by several biological parameters. Results strongly support the working hypothesis that biological differences are proportional to the evolutionary divergence among the DTUs, and highlight the need to take into account the phylogenetic diversity of T. cruzi natural stocks circulating in the emergent areas for Chagas disease in all applied studies dealing with clinical diversity of Chagas disease, immunology, diagnosis, prognosis, and drug and vaccine trials.
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Ramírez JD, Turriago B, Tapia-Calle G, Guhl F. Understanding the role of dogs (Canis lupus familiaris) in the transmission dynamics of Trypanosoma cruzi genotypes in Colombia. Vet Parasitol 2013; 196:216-9. [PMID: 23351975 DOI: 10.1016/j.vetpar.2012.12.054] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2012] [Revised: 12/19/2012] [Accepted: 12/24/2012] [Indexed: 11/16/2022]
Abstract
The dog (Canis lupus familiaris) is the most important domestic reservoir of Chagas disease, a zoonosis that affects more than 10 million people in Latin America. Trypanosoma cruzi, the etiologic agent of the disease, displays remarkable genetic variability, as indicated by its six genotypes (TcI-TcVI). A pilot study was conducted to establish the prevalence of T. cruzi among the canine population by analyzing 80 dogs. We report the identification of the TcI, TcII, TcIV and TcVI genotypes as single infections. TcI/TcII and TcI/TcIV presented as mixed infections and included the presence of Trypanosoma angel. The implications of this distribution are herein discussed. Based on the molecular epidemiology findings, this study suggests a plausible role for canine synanthropism in the transmission of T. cruzi.
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Affiliation(s)
- Juan David Ramírez
- Centro de Investigaciones en Microbiología y Parasitología Tropical-CIMPAT- Universidad de los Andes, Cra 1ª No. 18A-10, Bogotá, Colombia
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